Select Review activity to check for any unusual sign-in attempts on the Recent activity page.If you see account activity that you're sure wasn't yours, let us know and we can help secure your account—if it's in the Unusual activity section, you can expand the activity and select This wasn't me.If it's in the Recent activity section, you can expand the activity and select Secure your account.

Check the device. If the device doesn't appear to work at all (no lights appear on the device when it’s plugged in, or the cursor doesn't move or doesn't appear on the screen), connect the device to another PC and make sure the device works on that PC.

可通过不同的方式删除应用和程序，因此如果找不到要查找的应用和程序，可以尝试另一个位置。 请注意，某些应用和程序内置于 Windows 中，无法卸载。

In Windows 11, ensure that Camera access, Let apps access your camera, and the individual toggle for the Microsoft Store app you wish to use is turned on. If you do not see the app or website you're looking for in the list, it's likely a desktop app. Desktop apps cannot be individually toggled, but access for those apps can be controlled using Let desktop apps access your camera.

2. Fill out the form using a recognized device and location. If possible, complete the form using a device you previously used to sign into your account and at a location where you commonly use that device and that we'll recognize, such as your home or office.

Alternatively, you can install any website by going to the top corner of the browser and select Settings and more … > Apps > Install this site as an app.

View previous versions of a file. If your file is stored in OneDrive or SharePoint in Microsoft 365, you can go back to a previous version of file.

The Advanced Boot Options screen lets you start Windows in advanced troubleshooting modes. You can access the menu by turning on your computer and pressing the F8 key before Windows starts.

Windows 10 Windows 10, version 1607, all editions Windows Server 2016, all editions Win 10 Ent LTSC 2019 Win 10 IoT Ent LTSC 2019 Windows 10 IoT Core LTSC Windows Server 2019 Windows 10 Enterprise and Education, version 21H2 Windows 10 IoT Enterprise, version 21H2 Windows 10 Enterprise Multi-Session, version 21H2 Windows 10, version 22H2, all editions Windows 11 version 21H2, all editions ...

When you back up your files, apps, and settings in the cloud using your Microsoft account, you get 5 GB of free cloud storage and other benefits that protect your files with the latest security and make everyday tasks easier.