Access, download, or run the Surface app and the Surface Diagnostic Toolkit to help find and solve Surface problems.

If you’re having problems getting connected to a network and can’t get onto the Internet, here are some things you can try in Windows.

Learn Excel skills from beginner to advanced with video tutorials, templates, and tips from Microsoft Support.

This article describes a problem with CD or DVD drives not work, or is missing, or not recognized after installing or uninstalling programs.

You can repair some apps and programs if they're not running correctly. Note that you won't see repair, change, or modify options for all apps and programs.

Using Authenticator as a way to sign in. If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in:

Windows Media Player では、音楽またはビデオファイル (メディア Cd とも呼ばれます) を含むオーディオ Cd、データ Cd、データ Dvd を再生できます。

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product.

To edit a PDF, open it in Word. This works best with PDFs that are mostly text. PDFs of book chapters or something that looks like a manuscript from a copier won't be formatted well in Word.

Fresh Start in Windows 10 lets you perform a clean reinstallation and update of Windows while keeping your personal data and most Windows settings intact.