Select the Start button , right-click Computer, and then select Properties. Under System, see the system type. Which version of Windows should I install: the 32-bit version or the 64-bit version? How do I tell if my computer can run a 64-bit version of Windows? Windows 10 and Windows 8.1.

If your system is asking you for your BitLocker recovery key, the following information may help you locate your recovery key and understand why you're being asked to provide it. Important: Microsoft support is unable to provide, or recreate, a lost BitLocker recovery key.

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.

If you encounter issues installing games, try suspending your antivirus software temporarily while you attempt to troubleshoot game installation from the Xbox app or the Microsoft Store app on your PC.

An attacker who successfully exploited the vulnerability might bypass secure boot and load untrusted software. This security update addresses the vulnerability by adding the signatures of the known vulnerable UEFI modules to the DBX. To learn more about this security vulnerability, see the following advisory:

Mods—while fun—aren’t official Xbox products. When using mods, consider these factors: You mod at your own risk—the stability and security of your Windows device might be affected. Disabling mods for a game (i.e., disallowing them completely) requires uninstalling and reinstalling the game.

Uninstall from the Start menu. Select Start > All apps and search for the app in the list shown. Press and hold (or right-click) on the app, then select Uninstall. Uninstall in Settings. Select Start > Settings > Apps > Apps & features . Find the app you want to remove, select More > Uninstall.

If you pre-ordered a game and want to cancel, you can do so up to 10 days before the game launches at: Order history. After this time, you may be billed, and you’ll need to request a refund to cancel your order. For more info about digital game pre-orders, see: Pre-order Xbox digital games in the Microsoft Store.

Fixes an issue in which applications that use the MFC library of Visual C++ 2013 may behave incorrectly when the operating system is in high-DPI mode.

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.