Use System restore to make restore points when you install a new app, driver, or Windows update, and when you create a restore point manually. Restoring won’t affect your personal files, but it will remove apps, drivers, and updates installed after the restore point was made. To go back to a restore point: Use System Restore

If you’re having sound or audio problems, the following suggestions might help. The tips are listed in order, so start with the first one, see if that helps, and then continue to the next one if it doesn’t.

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

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. After you enter your key, you can download and install Office, or you can renew your Microsoft 365 subscription.

How to use the IF function (combined with the AND, OR, and NOT functions) in Excel to make logical comparisons between given values.

Virtualization lets your PC emulate a different operating system, like Android™ or Linux. Enabling virtualization gives you access to a larger library of apps to use and install on your PC. If you upgraded from Windows 10 to Windows 11 on your PC, these steps will help you enable virtualization.

Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows 8.1, Windows 8, Windows 7 or Windows Vista.

在工作或学校帐户中： 如果设备曾使用工作或学校电子邮件帐户登录到组织，则恢复密钥可能存储在该组织的 Azure AD 帐户 中。 你可以直接访问它，或者可能需要联系该组织的 IT 支持人员才能访问恢复密钥。 了解在 Windows 中查找 BitLocker 恢复密钥的不同方法，并了解如何在系统上激活 BitLocker。

To unblock your account, you'll need to reset your password. Enter the email address of the blocked account, then enter the characters you see on your screen and select Next. Enter the code generated by your authenticator app or select Use a different verification option to get a text message.

ถ้าคุณไม่สามารถลงชื่อเข้าใช้บัญชีผู้ใช้อีเมล Outlook.com, Hotmail, Live หรือ MSN หรือคุณไม่แน่ใจเกี่ยวกับวิธีการลงชื่อเข้าใช้หรือลงชื่อออก ต่อไปนี้เป็น ...