I am running Windows XP SP3 and I have 4 gig RAM, my processor is an AMD Phenom II Black Edition 3.12 GHz dual-core processor (not overclocked), and I have a 1 TB hard drive (does not need to be defragmented). I recently got a new hard drive and reinstalled Windows. I have had nothing but trouble with this PC and most of the time it has been off and not working since I built it, as it would work for about a month or maybe as few as a few days. I RMAed my motherboard several times, also got a 2nd stick of memory (was running 2 gig) to see if my memory was bad, replaced the PSU, RMAed the processor, this PC is all new parts or has been RMAed to death (except the case, which is from around the year 2002). But it is clocking like crazy. I use MalwareBytes Pro anti-virus software, Spybot Search&Destroy to innoculate and scan, and MS Malicious Software Removal Tool. No malware of any kind. I am at the end of my rope, unable to figure out why this pc is not working properly! It takes 20 minutes to bring up some common programs that should come up in under a minute. Is there anything I can do? Anything I have possibly not checked yet, in the several years I have been trying to get this PC to work? There must be something. My mom's single-core 2.16 GHz laptop with a tiny hard drive and half the RAM my desktop has works several orders of magnitude better than mine does.