Learn how to use the System File Checker tool (SFC.exe) to scan and restore missing or corrupted system files in Windows. Follow the steps to run the tool, view the details, and manually replace the corrupted files if needed.

Learn how to restore the Hosts file to its original state if you modified it and caused connectivity issues. Follow the steps for your Windows version and copy the sample Hosts file text.

Learn how to use PC Health Check app to check your device health, battery capacity, storage capacity, startup time, and Windows 11 eligibility. Find out how to install, update, and troubleshoot the app.

Learn how to use the PC Health Check app or the Microsoft Compatibility Appraiser task to see if your device meets the system requirements for Windows 11 after changing your hardware. Find out how to refresh the eligibility assessment and what factors affect the upgrade offer.

Learn how to update your Xbox console by downloading a file to a USB flash drive and installing it manually. Find out what to do if the update is not successful and how to troubleshoot common errors.

Learn how to protect yourself from the data breach of National Public Data, an online background check service, in early 2024. Find out what data was exposed, the risks involved, and the actions to take with Microsoft Defender for Individuals.

Learn how to mitigate the L1TF and MDS variants of speculative execution side-channel attacks that affect Intel processors. See the security advisories, updates, and performance impact of the mitigations.

Learn how to download and install Microsoft 365 or Office 2021 on a PC or Mac with a Microsoft account, work or school account. Find tips, troubleshooting, and activation steps for Microsoft 365 or Office products.

Learn how to use MSINFO32 to gather and display information about your computer hardware, system components, and software environment. Find out how to run MSINFO32 from the command prompt with different switches and parameters.

Learn how to access your Outlook.com, Hotmail, Live, or MSN email account and troubleshoot common sign-in issues. Find out how to sign out, stop automatic sign-in, and get help from Microsoft.