Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features. Select the Download button on this page.

Free up drive space in Windows. If your PC is running low on free space, you might not be able to install important Windows updates, and your PC’s performance may be affected. Here are some ways to free up space so you can keep your PC up to date and running smoothly.

Blue Screen errors (also sometimes called black screen errors or STOP code errors) can occur if a serious problem causes Windows to shut down or restart unexpectedly. You might see a message that says, "Windows has been shut down to prevent damage to your computer" or a similar message.

Windows Security has reputation-based protection that can help protect your PC from potentially unwanted applications. Potentially unwanted app blocking was first introduced in the Windows 10 May 2020 update and is turned off by default for enterprise and consumer customers.

How to stay safe with a genuine Office license. Note: If you already bought genuine Office, but haven't installed it yet, make sure you Uninstall the counterfeit version of Office first. If you already installed genuine Office, uninstall both versions and then reinstall the genuine version.

Site admins, owners, members, and visitors can view site usage data. Site visitors cannot run external user reports or download the 90-day usage report. Some functionality is introduced gradually to organizations that have set up the targeted release options in Office 365.

Outlook soft resiliency add-in notifications. For some scenarios, Outlook doesn't disable the unhealthy add-in automatically, but takes a more softened approach where it shows the following notification and provides an option to disable in case you want to disable it yourself.