My computer started acting strange a month ago. Bootup becomes very slow - after BIOS it takes a few minutes for the Vista loading bar to appear, and then, even more minutes to hit the login page. After login it takes a very long time to start the virus shield (Trend Micro Internet Security), and computer is not very responsible for a while. After a while, everything goes back to normal. Diagnostic - Performance log will show startup as degradation, followed by a number of completely random components responsible for the slowdown. One of svchost, taskmgr, explorer.exe, virus shield's service, and even a cryptic "CPU resources overutilized, cannot locate cause".
I did everything I could think of. Check RAM - check. Scan HDD (including surface scan) - check. Full virus/spyware scan - check. Reinstall Vista - check. Boot in safe mode - check. Disable all unnecessary services and processes - check. Flash BIOS to latest version - check. Experiment with various drivers for video card, network card, etc. - check.
Nothing works. Even in safe mode it's only a little bit faster to boot.
At this point, I believe it is hardware related... perhaps in my motherboard, an ASUS P5K. I have other computers, but those are older ones and cannot exchange components to test.
I think I'll just throw money at it. I'll go build a new computer, with new CPU, motherboard, RAM and a new HDD. Then I'll slowly move things over and see where the problem really is.
I had planned to wait for Windows 7 before building a new computer, but today I spent 3 hours to get my computer to boot. I think I've had enough...
*Sigh* I've been spending a lot lately... my O2mini broke, external speaker won't make any more sound - USD800 for a HTC Touch Pro 2.