Trying to isolate performance problems that at times renders my computer almost useless. Ongoing issues with unusually high levels of "Hardware interrupts and DCP's" (in the 30% of CPU cycle range) reported by Process Explorer. Testing with Memtest and scanning hard drive with chkdsk have not revealed any memory or hard disk problem that could account for this. Scanning wth AVG (version 2014.0.4259, virus database version 3681/7007 and LinkScanner version 2093) reports 29 rootkit issues but attempts to repair report back "Cannot Be Removed. The Data Is Invalid." for ALL of them. BTW, had to let scan run overnight... it was over 6 hours and counting when I went to bed but did eventually complete.