Resolving view state message authentication code (MAC) errors
To prevent this kind of tampering attack, the __VIEWSTATE field is protected by a message authentication code (MAC). ASP.NET validates the MAC that is submitted together with the __VIEWSTATE payload when a postback occurs. The key that is used to calculate the MAC is specified in the application's element in the Web.config file.
Protection History in the Windows Security App | Microsoft Support
One of the Windows Security app features is protection history, which provides a comprehensive list of actions that Microsoft Defender Antivirus has taken on your behalf, potentially unwanted apps that have been removed, and key services that are turned off.
Gaming Services Repair Tool for PC | Xbox Support
Learn how to use the Gaming Services Repair Tool to troubleshoot installation and update issues with Gaming Services on PC.
XBOX Update Preview Release Notes | Xbox Support
Delta Ring (2608.260831-1200) Hey XBOX Insiders! We are releasing a new XBOX Update Preview to the Delta ring today. Continue reading below to learn all about what's included with this update.
Avoid and report Microsoft technical support scams
Microsoft will never proactively reach out to you to provide unsolicited PC or technical support. If you receive a phone call claiming to be from Microsoft, or see a pop-up window on your PC with a fake warning message and a phone number to call and get your "issue" fixed, it's better to be safe and not click any links or provide any personal information.
Virus and Threat Protection in the Windows Security App
Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.
Solve PC problems remotely using Quick Assist | Microsoft Support
Quick Assist lets someone you trust take over your Windows PC and fix a problem from wherever they are.
Windows Update Assistant | Microsoft Support
Windows 11 Windows 10 Summary The Windows Update Assistant helps you manually download and install the latest Windows feature update on a compatible PC. Feature updates introduce new capabilities and help keep your device secure. Use this tool if your device hasn’t received a feature update automatically through Windows Update.
Open Device Manager - Microsoft Support
Open Device Manager Select Start , enter device manager. Then, select Device Manager from the search results.
Manage your saved passkeys | Microsoft Support
To delete a device-bound passkey (a passkey stored to your Windows device), select > Delete passkey next to the passkey name. Manage where your Windows passkeys are saved Use the Settings app to manage advanced options for your passkeys. In the advanced passkeys options, you can configure passkey services. In the Settings app on your Windows device, select Accounts > Passkeys > Advanced ...
Applies To: Microsoft account dashboard