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Boot scans, also referred to as shoe scans or preboot virus scans, are a sophisticated tool that antimalware software utilizes to identify and eliminate malware that might not have been detected by standard scanning programs. This type scan can be set to be scheduled to run automatically at regular intervals or manually by the user when they suspect that their computer is infected. Many antivirus tools allow users to choose the degree of sensitivity for the boot scan and also decide on the actions that should be taken when the threat is identified.

A boot scan is efficient because it allows an antimalware program detect files in use by the OS. These files aren’t capable of being deleted since they are always accessed by the OS. They will return an Access Denied message when you attempt to remove them. The boot scan will locate these files and allow the antivirus software to eliminate them before the OS can start using them.

The duration of a scan during boot will vary depending on several factors, such as the speed and amount of system files that are being scan. It also depends on whether the device is running during the scanning process. It is common for this type scan to take significantly longer than the standard antivirus scan because of the comprehensive nature of the process.