How to Scan Your Drive in Windows 1. Open Windows Security · Click the Start menu, type “Windows Security,” and open the app. 2. Run a Virus & Threat Scan · Go to Virus & threat protection. · Click Quick scan for a fast check, or choose Scan options to run a Full scan (all files) or Custom scan (specific folders). 3. Check Drive for Errors (CHKDSK) · Open File Explorer, right-click the drive you want to check, and select Properties. · Go to the Tools tab, then click Check under Error checking. ·