Learn how to use the Program Install and Uninstall troubleshooter to fix corrupted registry keys, prevent programs from being installed or removed, and access the product code. The troubleshooter runs on Windows 10, 8.1, 8, and 7.

Learn how to use Microsoft Defender Antivirus to scan and remove malware from your PC. Follow the steps to run an offline scan, view the results, and take action against detected threats.

Learn how to use PC Health Check app to check your Windows device health, troubleshoot problems, and upgrade to Windows 11. Find out how to install, open, and update the app, and see your device specifications and tips.

Learn how to use 25-character codes to make Xbox purchases and extend your subscriptions. Follow the instructions for different devices and platforms, such as Xbox, PC, mobile, and Microsoft Store.

Learn how to redeem Xbox digital codes or gift cards online or on your console, and troubleshoot common issues. Find out how to check your balance, region, subscription, and more.

Learn how to set your preferred home page in different browsers, including Microsoft Edge, Internet Explorer, Google Chrome, Firefox, and Safari. You can use a custom URL, a blank page, or the current page as your home page.

Learn how to redeem a Microsoft gift card, Xbox download code or token, Office product key, or Windows activation code to your Microsoft account. Find troubleshooting tips and contact support if you need help.

Learn how to install Project Online, Project Professional, or Project Standard on your PC. Follow the steps for subscription or non-subscription versions, and find help and tips for troubleshooting.

Learn how to troubleshoot common issues with sharing your Microsoft 365 Family subscription, such as invitation not received, sharing not available, subscription expired, or product key used. Find out how to share your subscription with up to five others and manage their storage and access.

Learn how to speed up your PC with Windows 11 or Windows 10 by updating, restarting, using ReadyBoost, managing page file size, freeing up space, and more. See the steps and screenshots for each tip.