Need more help? If you can't find an app or program, try the tips in See all your apps in Windows 10 and Program is not listed in add/remove programs after installation. If you get an error message when you're uninstalling, try the Program Install and Uninstall Troubleshooter.

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

Windows 10. Use System restore to make restore points when you install a new app, driver, or Windows update, and when you create a restore point manually. Restoring won’t affect your personal files, but it will remove apps, drivers, and updates installed after the restore point was made. To go back to a restore point:

If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

Restoring files from a backup. Restoring files from previous versions. Learn how to recover files that have been lost, deleted, or accidentally changed.

Restore from a system restore point. Learn about the recovery options in Windows. Find out how to reset your PC, go back to a previous version of Windows, or use media to reinstall Windows.

Use this app to try to recover lost files that have been deleted from your local storage device (including internal drives, external drives, and USB devices) and can’t be restored from the Recycle Bin.

To reset the OneDrive desktop sync app in Windows. Press the Windows key and R to open the Run dialog box, enter wsreset.exe, then select OK. A blank Command Prompt window will open, and after about ten seconds the window will close. You can close the Microsoft Store window.

Select the Start button, then select Settings > Update & Security > Activation . Then select Go to Store to go to the Microsoft Store app where you can purchase a Windows 11 digital license. Go to Store. Need more help? If you need additional help reactivating Windows on your device, contact customer support .

Windows 10. In the search box on the taskbar, type device manager, then select Device Manager from the menu. Open Device Manager.