Windows Power Management

Windows power management makes computers instantly accessible to users at the touch of a button or key. It also ensures that all elements of the system—applications, devices, and user interface—can take advantage of the vast improvements in power management technology and capabilities.

The Windows operating system uses power-management hardware to put the computer into a low-power sleep state instead of shutting down completely, so that the system can quickly resume working. The operating system will automatically enter the sleep state when the computer is idle or when the user presses a button to indicate that the current work session is over. To the user, the system appears to be off. While in the sleep state, the computer’s processor is not executing code and no work is being accomplished for the user. However, events in the system from both hardware devices and the real-time clock can be enabled to cause the system to exit the sleep state (that is, «wake up») and quickly return to the working state.

When the computer is in the sleep state, the computer hardware, the system, and applications running on the computer must be capable of responding immediately to the power switch, communications events, and other actions. If all applications handle power state transitions gracefully, the user will perceive a more elegant and integrated system. Applications that do not handle these transitions can fail when the power is turned off and then on, because of data loss or a dependency on a device that may have been removed.

The following are benefits of Windows power management:

• Eliminates startup and shutdown delays. The computer need not perform a full system boot when exiting the sleep state or a full system shutdown when the user initiates the sleep state.
• Enables automated tasks to run while the computer is in the sleep state. The Task Scheduler enables the user to schedule applications to run; scheduled events can run even when the system is in the sleep state. The Task Scheduler uses waitable timers to ensure that the system is ready when the application is scheduled to run. For more information, see the help file included with the Task Scheduler.
• Enables per-device power management. Devices that are not in use can save power by entering the sleep state.
• Improves power efficiency. Power efficiency is particularly important on portable computers. Reducing system power consumption translates directly to lower energy costs and longer battery life.
• Enables users to create power schemes, set alarms, and specify battery options through the Power Options application in Control Panel. The operating system coordinates all power management activities, based on power policy settings. For more information, see the help file included with the Power Options application.

Windows switch

Purchased laptop new, with Windows 7, many years ago.

Then Upgraded to 10 a few years later.

Latest 10 update crashed the laptop.

Since my Laptop came brand-new with 7, do I need to re-install 7, before I can get back up to version 10 ?

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You can immediately reinstall Windows 10 without issue.

I assumed that was the case. But it appears as though my partitions are wiped/formatted, because .

I get to 93% download then it kicks out and says:

«Windows cannot install required files. Make sure all files required for installation are available, and restart the installation«.

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Use the Windows 10 media creation tool on the Software download page

«Start fresh with a clean installation of Windows 10»

Reinstall Windows 10:

» How to Clean Install Windows 10″

This tutorial will show you how to create a bootable USB flash drive that can be used to install Windows 10 with or without UEFI.

To access BIOS/UEFI — UEFI/EFI configuration:

When your free upgrade to 10 was originally activated Microsoft will have kept the Hardware Configuration details of your device on their Servers for recognition purposes if you have to reinstall 10.

» Activation in Windows 10″ (Digital entitlement)

Bill Smithers — Microsoft MVP July 2013 — Dec 2020

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My bad, I’ve already tried several installs from a bootable USB, hence my statement. I get to 93% download then it kicks out and says:
» Windows cannot install required files. Make sure all files required for installation are available, and restart the installation «.

I believe I might have selected «format» on a couple of partitions. Dunno.

I have tried the BIOS factory reset and have no files/data to lose in this eventual re-install.

I’ve followed a few YouTube tech guys from the far-east and swam around with some DOS commands and it appears that my Hard drives are good, error free.

thx for the patience

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Thx for reading all of the posts.

During a recent lengthy MS windows routine update, my older laptop stopped functioning.

AFTER creating a bootable USB flash drive from my new laptop,

I discovered I was not able to install windows in the older laptop. As I posted, here is what it states when I reach 93% upload:

» Windows cannot install required files. Make sure all files required for installation are available, and restart the installation «.

I believe I might have selected «format» on a couple of partitions. I Dunno.

I have tried the BIOS factory reset and have no files/data to lose or worry about. This is just a music/vid laptop, now.

I’ve followed a few YouTube tech guys from the far-east and swam around with some DOS commands and it appears that my Hard drives are good, error free. It states drives ok

thx for the patience

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Format the USB flash drive that you used for the Win 10 install or get a new one. Check it with one of the tools described here: https://www.raymond.cc/blog/how-to-check-and-test-usb-flash-drive/

Then make a new bootable USB flash drive with a freshly-downloaded ISO file using one of the methods here: https://www.tenforums.com/tutorials/2376-create-bootable-usb-flash-drive-install-windows-10-a.html

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Format the USB flash drive that you used for the Win 10 install or get a new one. Check it with one of the tools described here: https://www.raymond.cc/blog/how-to-check-and-test-usb-flash-drive/

Then make a new bootable USB flash drive with a freshly-downloaded ISO file using one of the methods here: https://www.tenforums.com/tutorials/2376-create-bootable-usb-flash-drive-install-windows-10-a.html

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I’d still check the flash drive using one of the suggested tools and then re-download the Windows 10 ISO file.

I’d suggest using Rufus, as described in «Option 2» of the tenforums tutorial, to create your bootable installer, rather than the Microsoft Media Creation Tool.

A major — and long-standing — problem with downloading Windows ISO files is Microsoft’s inexplicable refusal to supply integrity checksums (MD5, SHA1, SHA256) for its download files. Supposedly the Media Creation Tool performs some integrity check before it offers the chose of creating a bootable installer or an ISO file, but AFAIK, that’s based on anecdotal reports rather than from any definitive Microsoft source.

Although many, many people have successfully downloaded and installed Windows 10 using the Media Creation Tool, given your experience, I’d suggest doing it twice, creating two separate ISO files, and then computing and comparing checksums of the two files. If they match, either the files are OK or you’ve managed to create the same error both times, which seems highly unlikely.

Switch Power Scheme — легкий переключатель между схемами электропитания в Windows

В Windows 10 разработчики перенесли значительную часть настроек в более удобное приложение «Параметры», но к остальным средствам администрирования получить доступ можно по-прежнему через классическую панель управления. В том числе к настройкам схем электропитания. Если вам часто приходится переключаться между схемами электропитания, есть смысл воспользоваться утилитой Switch Power Scheme, избавляющей от необходимости лезть в настройки системы.

Главная задача этого небольшого портативного приложения — обеспечить максимально удобный доступ к уже имеющимся в Windows схемам электропитания.

Чтобы переключиться в ней на ту или иную схему, достаточно дважды кликнуть по ней в окошке утилиты. Также вы можете выделить схему мышкой и нажать на панели кнопку «Применить выбранный». Дополнительно утилитой поддерживается организация быстрого доступа к некоторым смежным функциям и получение идентификатора выбранной схемы. В меню Switch Power Scheme вы найдете следующие опции:

• Удаление и переименование схемы.
• Экспорт схемы в файл POW.
• Создание ярлыка на выбранную схему.
• Получение названия, описания и GUID схемы.
• Запуск powercfg.exe в командной строке с ключом L.
• Вызов окошка дополнительных параметров питания.

Из прочих дополнительных возможностей инструмента следует отметить возможность быстрого перехода в Центр мобильности и доступ к настройкам спящего режима, интеграцию в контекстное меню Проводника, а также автозагрузку Windows.

Для простого переключения между режимами будет достаточно прав пользователя, а вот для создания ярлыка или добавления опций утилиты в Проводник запускать ее потребуется с правами администратора.

INSPECTION PROCEDURE C-1: Power windows do not work at all.

caution

Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal. When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in Immobilizer System — How to Register Key ID .)

COMMENTS ON TROUBLE SYMPTOM

PROBABLE CAUSES

DIAGNOSTIC PROCEDURE

STEP 1. Check the power supply system.

Q. Is the check result normal?

Go to Step 2

Refer to GROUP 54A — Malfunction of ETACS-ECU Power Supply Circuit .

STEP 2. M.U.T.-III diagnosis code

Q. Is the diagnosis code set?

Refer to GROUP 54A — Diagnosis Code Chart .

Go to Step 3

STEP 3. M.U.T.-III data list

Check the ETACS-ECU service item related to the power window.

Item No. Item name Normal condition 254 IG Voltage System voltage

OK: Normal condition is displayed.

Q. Is the check result normal?

Go to Step 4

Refer to GROUP 54A — Inspection Procedure 2: The ignition switch (IG1) signal is not received .

STEP 4. Voltage measurement at the ETACS-ECU connector (+B1 terminal).

(1)Disconnect the connector, and measure at the wiring harness side.

(2)Measure the voltage between the ETACS-ECU connector (+B1 terminal) and body earth. OK: System voltage

Q. Is the check result normal?

Go to Step 6

Go to Step 5

STEP 5. Check of short to power supply, short to earth, and open circuit in +B1 line between ETACS-ECU connector and fusible link.

Q. Is the check result normal?

No action is necessary and testing is complete.

Repair the connector(s) or wiring harness.

STEP 6. Voltage measurement at the ETACS-ECU connector (IOD1 terminal).

(1)Disconnect the connector, and measure at the wiring harness side.

(2)Measure the voltage between the ETACS-ECU connector (IOD1 terminal) and body earth. OK: System voltage

Q. Is the check result normal?

Go to Step 8

Go to Step 7

STEP 7. Check of short to power supply, short to earth, and open circuit in IOD1 line between ETACS-ECU connector and fusible link.

Q. Is the check result normal?

No action is necessary and testing is complete.

Repair the connector(s) or wiring harness.

STEP 8. Voltage measurement at the power window main switch connector (+BP terminal).

(1)Disconnect the connector, and measure at the wiring harness side.

(2)Measure the voltage between the power window main switch connector (+BP terminal) and body earth. OK: System voltage

Q. Is the check result normal?

Go to Step 10

Go to Step 9

STEP 9. Check of short to power supply, short to earth, and open circuit in +BP line between ETACS-ECU connector and power window main switch connector.

Q. Is the check result normal?

No action is necessary and testing is complete.

Repair the connector(s) or wiring harness.

STEP 10. Resistance measurement at the power window main switch connector (E, DL terminal).

(1)Disconnect the connector, and measure at the wiring harness side.

(2)Measure the resistance between the power window main switch connector (E, DL terminal) and body earth. OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 12

Go to Step 11

STEP 11. Check of open circuit in E, DL line between power window main switch connector and body earth.

Q. Is the check result normal?

YES : No action is necessary and testing is complete.

Repair the connector(s) or wiring harness.

STEP 12. Retest the system.

(1)Make the power widows learn their fully closed position.( )

(2)Check that the all power windows work normally.

Q. Is the check result normal?

No action is necessary and testing is complete.