If you can't find a file on your computer or you accidently modified or deleted a file, you can restore it from a backup (if you're using Windows backup) or you can try to restore it from a previous version. Previous versions are copies of files and folders that Windows automatically saves as part of a restore point.

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.

A Windows product key is a 25-character code used to activate Windows. It looks like this: PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. Locate your product key for Windows 10 or Windows 11.

Find your notifications. Windows 11 puts notifications in Notification Center—right on the taskbar—where you can get to them instantly. Notifications at a glance. Select the date and time in the taskbar to open the Notification Center.

There are several ways to find out which Surface device model you have. Look in the Surface app. Look in Settings. Look in System information. Look at devices associated with your Microsoft account.

To enable JavaScript in Firefox, please review and follow the instructions provided at JavaScript settings for interactive web pages. This article describes step for users to allow all Web sites in the Internet zone to run JavaScript in Internet Explorer, Chrome, and Firefox.

Get help with a damaged or unreadable code. If you’re unable to read all 25 characters of your digital code, you’ll need to request a replacement code by contacting aka.ms/contactxboxsupport. When you contact support, make sure to provide the proof of purchase, the serial number, and a picture of the damaged code.

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

Blocked senders are domains and people you don't want to receive email messages from. Messages received from any email address or domain in your blocked senders list are sent directly to your Junk Email folder. For more details, see Blocked senders.

Find your files in Windows 11 using one of these methods. Search from the taskbar: Type the name of a document (or a keyword from it) into the search box on the taskbar. You'll see results for documents across your PC and OneDrive.