So, when Kaspersky Internet Security 2011 (11) starts doing a full scan, I can see my CPU activity going to 100%. However, the KIS process only takes 02% according to Task manager, how is this possible? When I quit the scan, CPU activity drops to normal.
Perhaps the AV scan engine is running as a service, spawning a child process for the scanning. As @Wil mentioned, I'd recommend you to launch Process Explorer and sort by CPU% when the scan is running, that should give a better idea as to where the CPU is being used.
I cannot say for certain, but if it is anything like other Anti Virus programs, it most likely splits the front end application from the back end scan engine.
Make sure you tick the box (or give UAC authentication) in the bottom left hand corner that states
If you still do not see it, on the
Lastly, if these do not work, I would advise looking at Microsoft / Sysinternals Process Explorer.
Extra not that helpful lastly, if you are having problems, I would recommend switching to Microsoft Security Essentials. I use it exclusively now and am very happy with it.