Checking for malware on Windows 10 is essential to keep your system secure and running smoothly. Start by using Windows Security — go to Settings > Update & Security > Windows Security, then click on Virus & threat protection and run a Quick or Full Scan. You can also use trusted third-party antivirus tools for deeper scans. Keep your software and operating system updated to protect against new threats. Look for signs like slow performance, unexpected pop-ups, or unknown programs. Regular scanning and safe browsing habits help prevent and detect malware early on, keeping your PC safe.