I am having some difficulties with my homebuilt PC. It's a Q6600/P55 setup that was built a couple of years ago. I upgraded from a P45 mobo to a P55 mobo about 6 moinths ago.
I am running Windows 7 and I noticed a couple of days ago that the system was running incredibly slow. I checked for running processes and there was nothing consuming CPU. Then Windows Explorer would hang.
Soon after, Windows would intermittently hang at the "Starting Windows" screen.
Here were my troubleshooting steps
1) Checked for spyware/viruses/malware
Booted to safe mode. Performance issues happened in safe mode as well
Ran AV, hijackthis, and malware scans. All clean.
2) Suspected hard drive failure so I checked that
Ran chkdisk. Totally clean.
Installed fresh version of Windows on a new hard drive. Same issues appeared!
I am currently running Memtest86 and all of the RAM seems to be fine. That leaves us with the PSU, Mobo, or CPU as the culprit.
I am going to bench my PSU today at a store, but can anyone share some advice on how to troubleshoot the rest of the system? I need to isolate the problem fast so I can order parts. I use this PC for work.