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Recovery options in Windows - Microsoft Support
For a limited time after upgrading to Windows 11, you’ll be able to go back to your previous version of Windows by selecting Start > Settings > System > Recovery . Next to Go back , select Go back. This will keep your personal files, but it'll remove apps and drivers installed after the upgrade, as well as any changes you made to settings.
Use System Restore - Microsoft Support
Select the Start button, then type control panel in the search box next to the Start button on the taskbar and select Control Panel (Desktop app) from the results. Search Control Panel for Recovery, and select Recovery > Open System Restore > Next . Choose the restore point related to the problematic app, driver, or update, and then select Next ...
How to revert to an earlier version of Office - Microsoft Support
Important: This article provides a list of recommended steps to revert to an earlier version of Microsoft 365, Office 2019, or Office 2016 that is installed by using Click-to-Run. This article doesn’t apply to MSI versions of Office.
Recover an earlier version of an Office file - Microsoft Support
Go to File > Info. Under Manage Workbook or Manage Presentation, select the file labeled (when I closed without saving). In the bar at the top of the file, select Restore to overwrite any previously saved versions. Tip: In Word, you can also compare versions by clicking Compare instead of Restore.
Applies To: Excel for Microsoft 365, PowerPoint for Microsoft 365, Excel 2021, PowerPoint 2021, Excel 2019, PowerPoint 2019, Excel 2016, PowerPoint 2016
Delete your previous version of Windows - Microsoft Support
Ten days after you upgrade to Windows, your previous version of Windows will be automatically deleted from your PC. However, if you need to free up drive space, and you’re confident that your files and settings are where you want them to be in Windows, you can safely delete it yourself.
Go back to Windows 8.1 - Microsoft Support
Under Go back to the previous version of Windows 10, Go back to Windows 8.1, select Get started . By following the prompts, you'll keep your personal files but remove apps and drivers installed after the upgrade, plus any changes you made to settings. Try restoring your PC to its factory settings.
Reinstall Windows - Microsoft Support
If you're having problems with Windows 11 on your PC or you want a fresh copy of Windows 11 without the clutter of old files or apps, you can reinstall Windows 11 to try and fix your issues and return your PC to a cleaner state. Check your disk space.
Reactivating Windows after a hardware change - Microsoft Support
Get your product key. Reactivate Windows 11 after a hardware change. When you're ready to reactivate, make sure that your device is connected to the internet and then follow the steps for either a digital license or product key. If you have a digital license, run the Activation troubleshooter.
Upgrade to Windows 10: FAQ - Microsoft Support
There are several ways for you to go back from Windows 10 to a previous version of Windows: You'll be able to go back to an earlier version by selecting Start > Settings > Update & Security > Recovery . Then select Get started under Go back to the previous version of Windows 10. Go back to the previous version of Windows 10
Find lost files after the upgrade to Windows 10 or 11
Look for the files using Search. If you still can’t find your files, you may need to restore them from a backup. Enable a Windows Administrator account. Learn how to find your old files after upgrading your PC to Windows 10, including search and recovery tips.