Find your BitLocker recovery key - Microsoft Support
A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This key, which is a 48-digit number, is used to regain access to the drive. You might be prompted for the BitLocker recovery key during startup, due to a security risk or hardware change:
BitLocker overview - Microsoft Support
BitLocker is a Windows security feature that protects your data by encrypting your drives. This encryption ensures that if someone tries to access a disk offline, they won’t be able to read any of its content.
BitLocker Drive Encryption - Microsoft Support
BitLocker Drive Encryption allows you to manually encrypt a specific drive or drives on a device running Windows Pro, Enterprise, or Education edition. For devices managed by an organization, BitLocker Drive Encryption is usually managed by the IT department, as encryption might be required by organizational policies.
Remove specific prevalent malware with Windows Malicious Software ...
The Windows Malicious Software Removal Tool (MSRT) helps remove malicious software from computers that are running any of the following operating systems: Windows Server 2022. Windows 10. Windows Server 2019. Windows Server 2016. Windows 8.1. Windows Server 2012 R2. Windows Server 2008 R2. Windows 7. Windows Server 2008.
Activate Office - Microsoft Support
Activate a brand new Office product key. Troubleshoot activation errors. Activate Microsoft 365 or a non-subscription version of Office. When you start an Microsoft 365 app that's not activated, you'll be prompted to sign in to Microsoft 365.
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Publisher for Microsoft 365, Visio Plan 2, Excel 2024, Word 2024, Outlook 2024, PowerPoint 2024, Access 2024, OneNote 2024, Project Standard 2024, Visio Professional 2024, Visio Standard 2024, Office 2024, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Office 2021, OneNote 2021, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Office 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Publisher 2016, Office 2016, Microsoft 365 for home, Office for business, Microsoft 365 admin, Project for Office 365
Remove malware from your Windows PC - Microsoft Support
The Microsoft Defender Offline scan will automatically detect and remove or quarantine malware. Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.
Applies To:
OneDrive (home or personal), OneDrive for Windows
Back up your BitLocker recovery key - Microsoft Support
To learn how to verify if you have a BitLocker recovery key backed up to you Microsoft or work or school account, see Find your BitLocker recovery key. Important: Microsoft Support is unable to provide, or recreate, a lost BitLocker recovery key.
Automatically fix Windows security issues - Microsoft Support
Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features. Select the Download button on this page.
Fix problems that block programs from being installed or removed
The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs. It also fixes corrupted registry keys. First, you'll need to download the troubleshooter.
KB5042562: Guidance for blocking rollback of Virtualization-based ...
Rollback of these binaries might allow an attacker to circumvent VBS security features and exfiltrate data that is protected by VBS. This issue is described in CVE-2024-21302 | Windows Secure Kernel Mode Elevation of Privilege Vulnerability.