DavidR
3
Like RejZor I get a similar result on my standard scan no archives. You will obviously need to set the scan sensitivity to suit your system and run it at a time when it is not going to interfere with your usage of your system.
Let us know more about the system (HDD size, data size, etc.) and your scan settings.
When did you last defragment your HDD? A fragmented HDD can slow all types of program, moreso those that analyse files.