Windows Version Numbers

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Name / Description	Version	Build Number	Public Release	RTM Release
Windows NT 3.1	3.10	511	1993-07-27
Windows NT 3.5	3.50	807	1994-09-21
Windows NT 3.1, Service Pack 3	3.10	528	1994-11
Windows NT 3.51	3.51	1057	1995-05-30
Windows 95	4.00	950	1995-08-24
Windows 95 OEM Service Release 1	4.00	950 A	1996-02-14
Windows 95 OEM Service Release 2	4.00	950 B	1996-08-24
Windows NT 4.0	4.0	1381	1996-08-24	1996-07-31
Windows 95 OEM Service Release 2.1	4.00	950 B	1997-08-27
Windows 95 OEM Service Release 2.5	4.00	950 C	1997-11-26
Windows 98	4.10	1998	1998-05-15
Windows 98 Second Edition (SE)	4.10	2222	1999-05-05
Windows 2000	5.0	2195	2000-02-17	1999-12-15
Windows Me	4.90	3000	2000-09-14	2000-06-19
Windows XP	5.1	2600	2001-10-25	2001-08-24
Windows XP, Service Pack 1	5.1	2600.1105-1106	2002-09-09
Windows Server 2003	5.2	3790	2003-04-24
Windows XP, Service Pack 2	5.1	2600.2180	2004-08-25
Windows Server 2003, Service Pack 1	5.2	3790.1180	2005-03-30
Windows Server 2003 R2	5.2	3790	2005-12-06	2005-12-06
Windows Vista	6.0	6000	2007-01-30	2006-11-08
Windows Server 2003, Service Pack 2	5.2	3790	2007-03-13
Windows Home Server	5.2	4500	2007-11-04	2007-07-16
Windows Vista, Service Pack 1	6.0	6001	2008-02-04
Windows Server 2008	6.0	6001	2008-02-27	2008-02-04
Windows XP, Service Pack 3	5.1	2600	2008-04-21
Windows Vista, Service Pack 2	6.0	6002	2009-05-26	2009-04-28
Windows Server 2008, Service Pack 2	6.0	6002	2009-05-26
Windows 7	6.1	7600	2009-10-22	2009-07-22
Windows Server 2008 R2	6.1	7600	2009-10-22	2009-07-22
Windows 7, Service Pack 1	6.1	7601	2011-02-22
Windows Server 2008 R2, Service Pack 1	6.1	7601	2011-02-22	2011-02-09
Windows Home Server 2011	6.1	8400	2011-04-06	2011-04-06
Windows Server 2012	6.2	9200	2012-09-04	2012-08-01
Windows 8	6.2	9200	2012-10-26	2012-08-01
Windows 8.1	6.3	9600	2013-08-27	2013-10-17
Windows Server 2012 R2	6.3	9600	2013-10-18	2013-08-27
Windows 10, Version 1507	10.0	10240	2015-07-29	2015-07-15
Windows 10, Version 1511	10.0	10586	2015-11-10
Windows 10, Version 1607	10.0	14393	2016-08-02
Windows Server 2016, Version 1607	10.0	14393	2016-08-02
Windows 10, Version 1703	10.0	15063	2017-04-05
Windows 10, Version 1709	10.0	16299	2017-10-17
Windows Server 2016, Version 1709	10.0	16299	2017-10-17
Windows 10, Version 1803	10.0	17134	2018-04-30
Windows Server 2019, Version 1809	10.0	17763	2018-10-02
Windows 10, Version 1809	10.0	17763	2018-11-13
Windows Server 2008, Service Pack 2, Rollup KB4489887	6.0	6003	2019-03-19
Windows 10, Version 1903	10.0	18362	2019-05-21
Windows 10, Version 1909	10.0	18363	2019-11-12
Windows 10, Version 2004	10.0	19041	2020-05-27
Windows 10, Version 20H2	10.0	19042	2020-10-20

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Windows Version Numbers

A list of Windows version numbers & major Windows builds

Each Microsoft Windows operating system has a familiar name, like Windows 10 or Windows Vista, but behind each common name is an actual Windows version number 1 .

You can determine your Windows version a number of ways if you want to check which build number you’re currently running.

Windows Version Numbers

Below is a list of major Windows versions and their associated version numbers:

Reference Table for Windows Version Numbers
Operating System	Version Details	Version Number
Windows 10	Windows 10 (20H2)	10.0.19042
Windows 10 (2004)	10.0.19041
Windows 10 (1909)	10.0.18363
Windows 10 (1903)	10.0.18362
Windows 10 (1809)	10.0.17763
Windows 10 (1803)	10.0.17134
Windows 10 (1709)	10.0.16299
Windows 10 (1703)	10.0.15063
Windows 10 (1607)	10.0.14393
Windows 10 (1511)	10.0.10586
Windows 10	10.0.10240
Windows 8	Windows 8.1 (Update 1)	6.3.9600
Windows 8.1	6.3.9200
Windows 8	6.2.9200
Windows 7	Windows 7 SP1	6.1.7601
Windows 7	6.1.7600
Windows Vista	Windows Vista SP2	6.0.6002
Windows Vista SP1	6.0.6001
Windows Vista	6.0.6000
Windows XP	Windows XP 2	5.1.2600 3

_{[1] More specific than a version number, at least in Windows, is a build number, often indicating exactly what major update or service pack has been applied to that Windows version. This is the last number shown in the version number column, like 7600 for Windows 7. Some sources note the build number in parenthesis, like 6.1 (7600).}

_{[2] Windows XP Professional 64-bit had its own version number of 5.2. As far as we know, that’s the only time Microsoft has designated a special version number for a specific edition and architecture-type of a Windows operating system.}

_{[3] Service pack updates to Windows XP did update the build number but in a very minor and long-winded way. For example, Windows XP with SP3 and other small updates is listed as having a version number of 5.1 (Build 2600.xpsp_sp3_qfe.130704-0421 : Service Pack 3).}

How to Update Windows

To update Windows to the newest build number, use Windows Update. Using the built-in Windows Update utility is the easiest way to check for and install Windows updates.

If your version of Windows isn’t currently set up to install updates automatically, you can change the Windows Update settings so that new updates are downloaded and applied automatically. This is the simplest way to keep Windows updated to the latest version number.

Major Changes in Windows 10

Microsoft introduced several changes to the Windows operating system with the release of Windows 10. These are some of the biggest differences between Windows 10 and Windows 8 (and older versions of Windows):

Which version of Windows operating system am I running?

Find operating system info in Windows 10

To find out which version of Windows your device is running, press the Windows logo key + R, type winver in the Open box, and then select OK.

Here’s how to learn more:

Select the Start button > Settings > System > About .

Under Device specifications > System type, see if you’re running a 32-bit or 64-bit version of Windows.

Under Windows specifications, check which edition and version of Windows your device is running.

Related links

If you’re having a problem with activation, see Activate in Windows 10.

If you forgot the password you use to sign in to Windows devices or email, see How to reset your Microsoft password.

For info about updating Windows, see Windows Update: FAQ.

Find operating system info in Windows 8.1 or Windows RT 8.1

To find out which version of Windows your device is running, press the Windows logo key + R, type winver in the Open box, and then select OK.

If your device is running Windows 8.1 or Windows RT 8.1, here’s how to learn more:

If you’re using a touch device, swipe in from the right edge of the screen, tap Settings, and then tap Change PC settings. Continue to step 3.

If you’re using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, click Settings, and then click Change PC settings.

Select PC and devices > PC info.

Under Windows you’ll see which edition and version of Windows your device is running.

Under PC > System type you’ll see if you’re running a 32-bit or 64-bit version of Windows.

Related links

If you’re having a problem with activation, see Activate Windows 7 or Windows 8.1

If you forgot the password you use to sign in to Windows devices or email, see How to reset your Microsoft password.

For info about updating Windows, see Windows Update: FAQ.

Find operating system info in Windows 7

Select the Start button, type Computer in the search box, right-click on Computer, and then select Properties.

Under Windows edition, you’ll see the version and edition of Windows that your device is running.

Support for Windows 7 ended on January 14, 2020

We recommend you move to a Windows 10 PC to continue to receive security updates from Microsoft.

Related links

If you’re having a problem with activation, see Activate Windows 7 or Windows 8.1.

If you forgot the password you use to sign in to Windows devices or email, see How to reset your Microsoft password.

For info about updating Windows, see Windows Update: FAQ.

Windows 10 update history

Windows 10, version 2004 and Windows Server, version 2004

Updates for Windows 10, version 2004 and Windows Server, version 2004

Windows 10 is a service, which means it gets better through periodic software updates.

The great news is you usually don’t have to do anything! If you have enabled automatic updates, new updates will automatically download and install whenever they’re available, so you don’t have to think about it.

On the left side of this page, you’ll find a list of all the updates released for this version of Windows. You can also find more information about releases and any known issues. Installing the most recent update ensures that you also get any previous updates you might have missed, including any important security fixes.

For more information about the update and how to get it, see:

Current status of Windows 10, version 2004 and Windows Server, version 2004

For the most up-to-date information about Known Issues for Windows and Windows Server, please go to the Windows release health dashboard.

Known issues

Certain Japanese half-width Katakana and full-width Katakana characters that have a consonant mark aren’t interpreted as the same character. When you use the CompareStringEx() function with the NORM_IGNOREWIDTH flag to compare them, these characters are evaluated as different because of an issue in the sorting rule . This issue affects all the updates starting on June 9, 2020 for Windows 10, version 2004.

Open the Command Prompt window ( cmd.exe) with elevated privileges.

Run “reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nls\Sorting\Versions /ve /d 0006020F /f”

Restart the computer or processes to see the full effect.

Important If you have not installed KB4586853or later on the computer, setting an invalid value in this registry might prevent the computer from starting up.

This workaround reverts the National Language Support (NLS) sorting rule to version 6.2, which is used in Windows 10, version 1909 and earlier. When sharing data between systems, consider applying the workaround consistently. If you use this workaround, conduct sufficient testing and evaluations to mitigate problems caused by different sorting rule versions on multiple systems.

Notes and messages

General

IMPORTANT Release notes are changing! To learn about the new URL, metadata updates, and more, see What’s next for Windows release notes.

IMPORTANT Starting in July 2020, we will resume non-security releases for Windows 10 and Windows Server, version 1809 and later. There is no change to the cumulative monthly security updates (also referred to as the «B» release or Update Tuesday release). For more information, see the blog post Resuming optional Windows 10 and Windows Server non-security monthly updates.

IMPORTANT Starting in July 2020, all Windows Updates will disable the RemoteFX vGPU feature because of a security vulnerability. For more information about the vulnerability, seeCVE-2020-1036 and KB4570006. After you install this update, attempts to start virtual machines (VM) that have RemoteFX vGPU enabled will fail, and messages such as the following will appear:

If you re-enable RemoteFX vGPU, a message similar to the following will appear:

“The virtual machine cannot be started because all the RemoteFX-capable GPUs are disabled in Hyper-V Manager.”

“The virtual machine cannot be started because the server has insufficient GPU resources.”

«We no longer support the RemoteFX 3D video adapter. If you are still using this adapter, you may become vulnerable to security risk. Learn more (https://go.microsoft.com/fwlink/?linkid=2131976)”

Troubleshooting

If you have questions or need help activating or troubleshooting Windows, see our help topics below:

For information about how to update, see Update Windows 10.

If you have questions about manually installing or removing an update, see Windows Update: FAQ.

Getting an error message when updating? See Troubleshoot problems updating Windows 10.

If you need to activate Windows, see Activation in Windows 10. If you’re having trouble with activation, see Get help with Windows activation errors.

To get the latest major update to Windows 10, see Get the Windows 10 October 2020 Update.