If your PC is infected with persistent malware such as rootkits or especially stubborn malware, you should consider using Windows Defender Offline scan feature. When and why you should use Windows Defender Offline Scan Windows Defender offline scan: This mode can help you detect viruses that can be difficult to remove during regular scans.Custom Scan: This mode allows you to scan a folder of your choice for threats and security issues.

For example, the process is faster on PCs with SSD storage. It could take more than one hour depending on the number of files you have and hardware configuration.

Full Scan: This mode scans your entire PC for threats and security issues.

Quick scan: This mode scans for threats and security issues in locations where malicious contents are commonly found.

Windows Defender is one of the easiest ways to check your device for security issues and it allows you to perform the following scans: Windows 10 comes with built-in antivirus protection called Windows Defender/Security and it has matured into a good security solution over the past few years. If you use Windows and browse the internet regularly, it is strongly recommended to use antivirus/security protection software. This topic describes how to use Microsoft Defender Offline in Windows 10, Windows 8.1, and Windows 7.

Microsoft Defender Offline is a powerful offline scanning tool that runs from a trusted environment, without starting your operating system.

Microsoft offline scan