Use the System File Checker tool to repair missing or corrupted system ...
When critical Windows system files are missing or corrupted, your operating system may begin to malfunction. Common symptoms include Windows features not working properly, system errors, or Windows becoming unresponsive or freezing.
How to get a new Xbox 360 update
Learn how to update your Xbox 360 console.
Find your BitLocker recovery key - Microsoft Support
Learn how to find your BitLocker recovery key in Windows.
Xbox Support
Xbox Support ... Xbox Support
Uninstall or remove apps and programs in Windows - Microsoft Support
There are different ways to remove apps and programs, so if you can't find the one you're looking for, you can try another location. Note that some apps and programs are built into Windows and can't be uninstalled. You can try to repair a program first, if it's just not running correctly.
Set up and troubleshoot the Play & Charge Kit | Xbox Support
Learn how to use the Play & Charge Kit battery pack, along with some troubleshooting tips.
BitLocker Drive Encryption - Microsoft Support
Learn about BitLocker Drive Encryption in Windows and how to encrypt drives.
Fix problems that block programs from being installed or removed
First, you'll need to download the troubleshooter. Download troubleshooter. If you see the File Download box when you start downloading, select Run or Open. The troubleshooter provides steps for you to follow. If a program isn't listed in the uninstall options, you'll be asked for that program's product code.
Remove specific prevalent malware with Windows Malicious Software ...
Use this tool to find and remove specific prevalent threats and reverse the changes that they made (see Covered malware families). For comprehensive malware detection and removal, consider using Windows Defender Offline or Microsoft Safety Scanner.
BitLocker overview - Microsoft Support
What's a BitLocker recovery key? A BitLocker recovery key is a unique 48-digit numerical password that can be used to unlock an encrypted drive. Why is Windows asking for a recovery key? Windows requires a BitLocker recovery key when it detects a possible unauthorized attempt to access the data.