How to use the COUNTIF function in Excel to count the number of cells that meet values you set.

Decide which documents to recover from an unexpected close, delete recovered files you don't want, or close recovered files to review later.

Learn how to reset your PIN if you aren't signed in to Windows and having trouble using your PIN.

Use the new Outlook for Windows for coordinated Mail, Calendar and People apps on Windows 11.

Learn how to type a letter online using Word for the web. Choose a letter template for online letter writing. Edit, send or print your letter online.

Do you need some help installing Quick Assist? For the best experience, download and install the new version of the Quick Assist app from Microsoft Store. If you have problems installing Quick Assist, here are some steps to try to get it installed and working properly.

Get productive quickly with Microsoft 365 videos and tutorials. Explore Microsoft 365 training guides and tips to collaborate with anyone, anywhere.

Windows Update can help fix problems with your PC. Fix problems using Windows Update is a recovery tool that can help resolve issues related to updates. Using this tool will reinstall the current version of Windows on your device.

About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Learn how to activate Office pre-installed on new Windows 10 PCs or with a new product key.