Many antivirus programs offer the option of a boot scan. This is a powerful tool that can remove malware that cannot be eliminated by standard methods. This kind of virus can be hidden in the boot sector or encrypt files, and is generally more difficult to remove than a runtime scan. It is essential that you make use of an antivirus that is able to run a boot scan because this kind of virus isn’t only more difficult to detect but it can also be extremely harmful.
Avast’s Boot Scan is a very effective method of checking for hidden threats. It can identify threats that are typically not detected by runtime scanning, and can remove it without affecting the functioning of Windows. It may take a while to complete the scan since it must check all of your system files. It is therefore recommended to disable non-essential startup applications and disconnect external storage devices to allow the program to focus on internal files. It is also a good idea to schedule the scans for times when you will not use your computer for other purposes.
First, open Avast and then go to the Settings menu. Select the Protection tab in the settings menu and then click on the Boot-Time Scan tile. There you can select to enable a full or quick scan, download the most recent definitions, and configure the actions to be taken when a threat is detected.