«NLS data» BsoD — Old .cat missing its .mum?

For over a week now, I’ve been fighting a BSoD problem created when I foolishly ran Dell’s Alien Respawn tool. You can read that whole saga here:

I think I might have found the cause, so I’m posting a fresh, direct (sort of) question: looking at the DISMRepairLogFile.txt file, I mostly see missing-file errors referencing filenames like:

There are 16 filenames like this listed, all with «10.0.10586.0.mum» in their name. The listed .mum files are indeed missing, but there are corresponding .cat files, all from 2015 or 2016. Interestingly, there are a lot more *10.0.10586.0.cat files missing a corresponding .mum file that don’t give errors.

Besides these, there are three missing .mum files mentioned with KB numbers in their names, also from 2015 or 2016.

Could these files be the cause of the BSoD? After all, most of them appear to be NLS related. Is there a clean way to remove them (using the Recovery command line)? I’ve seen mention of the following command, but I’d like some concurrence before I try it:

DISM /online /cleanup-image /startcomponentcleanup

although in my case, from the Recovery command line, I assume it would be more like:

DISM /image:c:\ /cleanup-image /startcomponentcleanup

Replies (5) 

Hi JohnBreen3, I am Rob, an Independent Advisor not affiliated with Microsoft and a 15 time and dual award Microsoft MVP specializing in Windows troubleshooting and Bluescreen analysis. Please remember as independents we are not responsible for the development of Windows or the computer hardware and drivers. If you will work with me I will be here to help until the issue is resolved.

Let’s just skip to the most effective method to correct any Windows corruption that you may be experiencing.

A Repair Installation that allows you to keep the programs and data though redundant backups are always a good idea.

How to: perform a repair upgrade using the Windows 10 ISO file
http://answers.microsoft.com/en-us/insider/wiki.

Use the Windows 10 Media Creation Tool to create a USB Drive. verifier /reset hit enter to disable

If Driver Verifier creates a minidump upload it and post the link here so we can analyze it.

——
Standard Disclaimer: Those may be non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

Please let us know the results and if you need further assistance. Feedback definitely helps us help all.

How To Fix Annoying Cmexcept.cat Errors [SOLVED]

CAT problems with cmexcept.cat most often stem from a corrupt or missing Microsoft Windows file. Although annoying, these issues can usually be easily remedied through replacing the problem CAT file. In addition, if your cmexcept.cat error was due to a removed malware infection, we recommend running a registry scan to clean up any invalid file path references created by the malicious program.

Below, you find the latest file versions for %%os%% (and other OS versions). If we do not have a copy of your cmexcept.cat version, you can simply hit the «Request» button to request a copy. In some rare cases you might need to contact Microsoft Corporation directly for the correct file version you need.

Getting the cmexcept.cat file location correct is critical in making sure these errors are resolved successfully, so it doesn’t hurt to check to make sure. Test the outcome of your replaced file by opening Microsoft Windows and seeing if the error message is still being triggered.

cmexcept.cat File Summary
File Extension:	CAT
Application Type:
Lastest Software:	Microsoft Windows
Release Version:	6.3.9600.16384
Developer:	Microsoft Corporation

File Characteristics
File Name:	cmexcept.cat Request
Size (Bytes):	6236
SHA-1:	0e746ebb406b62b85f27260dd897ded0c7a8fc22
MD5:	473b12e5b8f427676b7e1a2a50e24088
CRC32:

Quick cmexcept.cat Troubleshooting FAQ

Q: What is cmexcept.cat?

The CAT file, cmexcept.cat, is included in the Microsoft Windows installation package developed by Microsoft Corporation.

Q: Why Do I Have cmexcept.cat Errors?

File corruption, missing, or accidetally deleting the cmexcept.cat can cause these CAT errors to occur.

Q: When Do cmexcept.cat Errors Occur?

Cmexcept.cat errors are typically seen during computer startup, program startup, or while trying to execute a specific funtion in Microsoft Windows that calls on the file.

Q: How Can I Fix Errors Related to cmexcept.cat?

​There are several steps involved in fully troubleshooting cmexcept.cat. Please follow our brief troubleshooting steps below, or use the more extensive guide later in this article.

Q: How to Quickly Troubleshoot cmexcept.cat Issues

Troubleshooting problems with cmexcept.cat is made easier by utilizing some wonderful internal troubleshooting tools. In the following steps below, we will show you which of these utilities to use to help solve your issues.

Scanning your PC for malware (with Windows Defender or similar solution) is the first step to making sure your error isn’t created by malicious cmexcept.cat corruption.

Using «regedit», manually look for any invalid entries, or automatically do a registry scan to ensure that all invalid cmexcept.cat entries are repaired.

Manually download a new copy of cmexcept.cat and place it back in the file path that it was originally installed.

Uninstall and re-install Microsoft Windows to restore cmexcept.cat.

Software Used:

Time to Complete: 5 minutes

Compatible with Windows 10, 8, 7, Vista and Windows XP

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Article ID: 971938

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Troubleshooting Article Quick Links

Other Known File Versions

Select OS Version

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Showing Results for:

File Name	File ID (MD5 Checksum)	File Size	Download
+ cmexcept.cat	473b12e5b8f427676b7e1a2a50e24088	6.09 KB	Request
Software: Microsoft Windows 6.3.9600.16384 Software Developer: Microsoft Corporation OS Version: Windows 8.1 Architecture: 64-bit (x64) File Size: 6236 MD5 Checksum: 473b12e5b8f427676b7e1a2a50e24088 SHA1 Checksum: 0e746ebb406b62b85f27260dd897ded0c7a8fc22 SHA256 Checksum: a541458cadc467a025fc8a925cbf8f6b14f5a774263275a3ebff0e1c4b10a801 CRC32: File Directory Location: C:\Windows\WinSxS\wow64_microsoft-windows-rascmak.resources_31bf3856ad364e35_6.3.9600.16384_en-us_3659cd8e34e72eee

Thank you, your file request has been received.

Common Cmexcept.cat Error Messages

The most common cmexcept.cat errors that can appear on a Windows-based computer are:

• «Cmexcept.cat error.»
• «Cmexcept.cat is missing.»
• «Cmexcept.cat not found.»
• «Cmexcept.cat failed to load.»
• «Failed to register cmexcept.cat.»
• «Runtime Error: cmexcept.cat.»
• «Error loading cmexcept.cat.»

These CAT error messages can appear during program installation, while a cmexcept.cat-related software program (eg. Microsoft Windows) is running, during Windows startup or shutdown, or even during the installation of the Windows operating system. Keeping track of when and where your cmexcept.cat error occurs is a critical piece of information in troubleshooting the problem.

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Causes of Cmexcept.cat Errors

Cmexcept.cat problems can be attributed to corrupt or missing files, invalid registry entries associated with Cmexcept.cat, or a virus / malware infection.

More specifically, these cmexcept.cat errors can be caused by:

• Corrupt Windows registry keys associated with cmexcept.cat / Microsoft Windows.
• Virus or malware infection that has corrupted the cmexcept.cat file or related Microsoft Windows program files.
• Another program maliciously or mistakenly deleted cmexcept.cat-related files.
• Another program is in conflict with Microsoft Windows and its shared referenced files.
• Corrupt download or incomplete installation of Microsoft Windows software.

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How To Fix Cmexcept.cat Errors

Below is a list of troubleshooting steps to resolve your cmexcept.cat problems. These troubleshooting steps get progressively more difficult and time consuming, so we strongly recommend attempting them in ascending order to avoid unnecessary time and effort.

Please Note: Click the [ ] image to expand the troubleshooting instructions for each step below. You can also click the [ ] image to hide the instructions as you proceed through each step.

Step 1: Repair Registry Entries Associated with Microsoft Windows

Sometimes cmexcept.cat and other CAT system errors can be related to problems in the Windows registry. Several programs can share the same cmexcept.cat file, but when these programs are uninstalled or changed, sometimes «orphaned» (invalid) CAT registry entries are left behind.

Basically, what this means is that while the actual file path may have changed, its incorrect former location is still recorded in the Windows registry. When Windows tries looking up these incorrect file references (file locations on your PC), cmexcept.cat errors can occur. In addition, malware infection may have corrupted the registry entries associated with Microsoft Windows. Thus, these invalid CAT registry entries need to be repaired to fix the root of the problem.

Manually editing the Windows registry to remove invalid cmexcept.cat keys is not recommended unless you are PC service professional. Incorrectly editing your registry can stop your PC from functioning and create irreversible damage to your operating system. In fact, one misplaced comma can prevent your PC from booting entirely!

Because of this risk, we recommend using a registry cleaner to assist with this process. Using a registry cleaner automates the process of finding invalid registry entries, missing file references (like the one causing your cmexcept.cat error), and broken links within the registry. A backup is automatically created before each scan, with the ability to undo any changes in a single click, protecting you against the possibility of PC damage.

As a Microsoft Silver Partner, we provide software that can assist you in removing these issues:

Caution: Unless you an advanced PC user, we DO NOT recommend editing the Windows registry manually. Using Registry Editor incorrectly can cause serious problems that may require you to reinstall Windows. We do not guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

To manually repair your Windows registry, first you need to create a backup by exporting a portion of the registry related to cmexcept.cat (eg. Microsoft Windows):

1. Click the Start button.
2. Type «command» in the search box. DO NOT hit ENTER yet!
3. While holding CTRL-Shift on your keyboard, hit ENTER.
4. You will be prompted with a permission dialog box.
5. Click Yes.
6. A black box will open with a blinking cursor.
7. Type «regedit» and hit ENTER.
8. In the Registry Editor, select the cmexcept.cat-related key (eg. Microsoft Windows) you want to back up.
9. From the File menu, choose Export.
10. In the Save In list, select the folder where you want to save the Microsoft Windows backup key.
11. In the File Name box, type a name for your backup file, such as «Microsoft Windows Backup».
12. In the Export Range box, be sure that «Selected branch» is selected.
13. Click Save.
14. The file is then saved with a .reg file extension.
15. You now have a backup of your cmexcept.cat-related registry entry.

The next steps in manually editing your registry will not be discussed in this article due to the high risk of damaging your system. If you would like to learn more about manual registry editing, please see the links below.

We do not claim any responsibility for the results of the actions taken from the content linked below — complete these tasks at your own risk.

Step 2: Conduct a Full Malware Scan of Your PC

There is a chance that your cmexcept.cat error could be related to a malware infection on your PC. These malicious intruders can damage, corrupt, or even delete CAT-related files. Furthermore, there’s a possibility that the cmexcept.cat error you are experiencing is related to a component of the malicious program itself.

Tip: If you do not already have a malware protection program installed, we highly recommend using Emsisoft Anti-Malware (download here). They offer a malware removal guarantee that is not offered by other security software.

Step 3: Clean Out Your System Junk (Temporary Files and Folders) With Disk Cleanup (cleanmgr)

Over time, your computer accumulates junk files from normal web surfing and computer use. If this junk isn’t occasionally cleaned out, it can cause Microsoft Windows to respond slowly or provides an cmexcept.cat error, possibly due to file conflicts or an overloaded hard drive. Cleaning up these temporary files with Disk Cleanup might not only solve your cmexcept.cat error, but can also dramatically speed up the performance of your PC.

Tip: Although Disk Cleanup is a wonderful built-in tool, it will not completely clean up all of the temporary files on your computer. Other programs that you frequently use such Microsoft Office, Firefox, Chrome, Live Messenger, and hundreds of other programs are not cleaned up with Disk Cleanup (including some Microsoft Corporation programs).

Because of the shortcomings of the Windows Disk Cleanup (cleanmgr) tool, we highly recommend using a specialized hard drive cleanup / privacy protection software to clean up your entire computer.

As a Microsoft Silver Partner, we provide software that can assist you in cleaning up your temporary files:

How to run Disk Cleanup (cleanmgr) (Windows XP, Vista, 7, 8, and 10):

1. Click the Start button.
2. Type «command» in the search box. DO NOT hit ENTER yet!
3. While holding CTRL-Shift on your keyboard, hit ENTER.
4. You will be prompted with a permission dialog box.
5. Click Yes.
6. A black box will open with a blinking cursor.
7. Type «cleanmgr» and hit ENTER.
8. Disk Cleanup will begin calculating how much occupied disk space you can reclaim.
9. The Disk Cleanup dialog box will appear with series of checkboxes you can select. In most cases, the «Temporary Files» category will occupy the most disk space.
10. Check the boxes of the categories you want to clean and click OK.

Step 4: Update Your PC Device Drivers

Cmexcept.cat errors can be related to corrupt or outdated device drivers. Drivers can work one day, and suddenly stop working the next day, for a variety of reasons. The good news is that you can often update the device driver to fix the CAT problem.

Finding the exact driver for your cmexcept.cat-related hardware device can be extremely difficult, even directly on the Microsoft Corporation or related manufacturer’s website. Even if you are experienced at finding, downloading, and manually updating drivers, the process can still be very time consuming and extremely irritating. Installing the wrong driver, or simply an incompatible version of the right driver, can make your problems even worse.

Because of the time and complexity involved in updating drivers, we highly recommend using a driver update software. A driver update tool ensures that you have correct driver versions for your hardware, and also creates a backup of your current drivers before making any changes. Maintaining a driver backup provides you with the security of knowing that you can rollback any driver to a previous version (if necessary).

As a Microsoft Silver Partner, we provide software that can assist you in updating these drivers:

Please Note: Your cmexcept.cat may not be related to hardware driver problems, but it’s always a good idea to ensure all of your PC device drivers are up-to-date to maximize PC performance.

Step 5: Utilize Windows System Restore to «Undo» Recent System Changes

Windows System Restore allows you to «go back in time» with your PC to help fix your cmexcept.cat problems. System Restore can return your PC’s system files and programs back to a time when everything was working fine. This can potentially help you avoid hours of troubleshooting headaches associated with CAT errors.

Please Note: Using System Restore will not affect your documents, pictures, or other data.

To use System Restore (Windows XP, Vista, 7, 8, and 10):

1. Click the Start button.
2. In the search box, type «System Restore» and hit ENTER.
3. In the results, click System Restore.
4. Enter any administrator passwords (if prompted).
5. Follow the steps in the Wizard to choose a restore point.
6. Restore your computer.

Step 6: Uninstall and Reinstall the Microsoft Windows Program Associated with Cmexcept.cat

If your cmexcept.cat error is related to a specific program, reinstalling Microsoft Windows-related software could be the answer.

Instructions for Windows 7 and Windows Vista:

1. Open Programs and Features by clicking the Start button.
2. Click Control Panel on the right side menu.
3. Click Programs.
4. Click Programs and Features.
5. Locate cmexcept.cat-associated program (eg. Microsoft Windows) under the Name column.
6. Click on the Microsoft Windows-associated entry.
7. Click the Uninstall button on the top menu ribbon.
8. Follow the on-screen directions to complete the uninstallation of your cmexcept.cat-associated program.

Instructions for Windows XP:

1. Open Programs and Features by clicking the Start button.
2. Click Control Panel.
3. Click Add or Remove Programs.
4. Locate cmexcept.cat-associated program (eg. Microsoft Windows) under the list of Currently Installed Programs.
5. Click on the Microsoft Windows-associated entry.
6. Click the Remove button on the right side.
7. Follow the on-screen directions to complete the uninstallation of your cmexcept.cat-associated program.

Instructions for Windows 8:

1. Hover the cursor in the bottom left of the screen to produce the Start Menu image.
2. Right-Click to bring up the Start Context Menu.
3. Click Programs and Features.
4. Locate cmexcept.cat-associated program (eg. Microsoft Windows) under the Name column.
5. Click on the Microsoft Windows-associated entry.
6. Click the Uninstall/Change on the top menu ribbon.
7. Follow the on-screen directions to complete the uninstallation of your cmexcept.cat-associated program.

After you have successfully uninstalled your cmexcept.cat-associated program (eg. Microsoft Windows), reinstall the program according to the Microsoft Corporation instructions.

Tip: If you are positive that your CAT error is related to a specific Microsoft Corporation program, uninstalling and reinstalling your cmexcept.cat-related program will likely be the solution to your problem.

Step 7: Run Windows System File Checker («sfc /scannow»)

System File Checker is a handy tool included with Windows that allows you scan for and restore corruptions in Windows system files (including those related to cmexcept.cat). If System File Checker finds a problem with your CAT or other critical system file, it will attempt to replace the problematic files automatically.

To run System File Checker (Windows XP, Vista, 7, 8, and 10):

1. Click the Start button.
2. Type «command» in the search box. DO NOT hit ENTER yet!
3. While holding CTRL-Shift on your keyboard, hit ENTER.
4. You will be prompted with a permission dialog box.
5. Click Yes.
6. A black box will open with a blinking cursor.
7. Type «sfc /scannow» and hit ENTER.
8. System File Checker will begin scanning for cmexcept.cat and other system file problems (be patient — the system scan may take a while).
9. Follow the on-screen commands.

Step 8: Install All Available Windows Updates

Microsoft is constantly updating and improving Windows system files that could be associated with cmexcept.cat. Sometimes resolving your CAT problems may be as simple as updating Windows with the latest Service Pack or other patch that Microsoft releases on an ongoing basis.

To check for Windows Updates (Windows XP, Vista, 7, 8, and 10):

1. Click the Start button.
2. Type «update» into the search box and hit ENTER.
3. The Windows Update dialog box will appear.
4. If updates are available, click the Install Updates button.

Step 9: Perform a Clean Installation of Windows

Caution: We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve cmexcept.cat problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately (download a highly-recommended backup solution [MyPCBackup.com Download]) to protect yourself from permanent data loss.

This step is your final option in trying to resolve your cmexcept.cat issue. Reinstalling Windows will erase everything from your hard drive, allowing you to start again with a fresh system. Furthermore, a clean install of Windows will also quickly clean out any and all «junk» that has accumulated over the normal usage of your computer.

Please Note: If cmexcept.cat errors still persist after a clean install of Windows, your CAT problem MUST be hardware related. If that is the case, then it is likely you will need to replace the associated hardware causing the cmexcept.cat error.

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Files Related to Cmexcept.cat

CAT Files Related to Cmexcept.cat

File Name	Description	Software Program (Version)	File Size (bytes)
KB2229593.CAT	Microsoft Windows 5.1.2600.5512	9146
KB2653956.CAT	Microsoft Windows 5.1.2600.5512	8566
oem0.cat	Microsoft Windows 6.3.9600.16384	8531
prnhp005.cat	Microsoft Windows 6.1.7600.16385	36236
prnin002.cat	Microsoft Windows 6.1.7600.16385	18055

Are You Still Experiencing Cmexcept.cat Issues?

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About The Author: Jay Geater is the President and CEO of Solvusoft Corporation, a global software company focused on providing innovative utility software. He is a lifelong computer geek and loves everything related to computers, software, and new technology.

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