Learn how to enable Adobe Flash in Microsoft Edge. By pressing submit, your feedback will be used to improve Microsoft products and services.

You weren't able to find your username. If the username lookup wasn't successful, try looking for your Microsoft account username within other products or services that you know are associated with that account. Read check your products or services to find out how.

My product key isn't working. If your Office product key doesn’t work, or has stopped working, you should contact the seller and request a refund. If you bought a product key separate from the software, it’s very possible the product key was stolen or otherwise fraudulently obtained, and subsequently blocked for use.

了解如何在 Windows 10 和 Windows 11 中添加用户帐户。 有了帐户之后，每个人都可拥有单独的文件、浏览器收藏夹和私人桌面。

A guide to help you identify and access your Microsoft account. How to check if your email is a Microsoft account? Go to the Microsoft account sign-in page at https://account.microsoft.com and enter your email address.

注: 最近 Windows 10 を更新して、ファイルを見つけるのに問題が生じている場合は、「Windows 10 へのアップグレード後に失われたファイルを検索する方法」をご覧ください。

Find and open File Explorer in Windows 10 and Windows 11, and customize Quick access by pinning and removing files and folders.

Help to fix install errors for Office, such as "can’t install Office", "something went wrong" or situations where install hangs or activation fails.

Go to Settings > Apps > Apps & features to change whether you're shown app recommendations when trying to install apps from outside the Store.

Learn how to troubleshoot and fix problems setting up your email in Outlook.