It sure sounds like a heat related problem.... Between the heatsink and the processor should be a thin coating of thermal grease/compound.. If you didn't apply new thermal compound after the cleaning, you'll need to do it now..
Hope this helps.
I have a bit of an issue with my home PC at the moment. No matter what I do it just does not want to boot up. It starts to boot and comes up with an error message similar to this below on a black screen.
We appologise for the inconvenience, but Windows did not start successfully. A recent hardware or software change might have caused this. If your computer stopped responding, restarted unexpectedly, or was automatically shut down to protect your files and folders... or if a previous startup attempt was interrupted ....
Safe Mode with Networking
Safe Mode with Command Promt
Last Known Good Configuration
Start Windows Normally
If I choose any of the safe mode options it scrolls with a list of 30 or so errors similar to this one below
If you choose start windows normally or last known good config it just reboots.
I have tried to run the windows XP setup disk and after doing the driver loading it comes up with a blue screen of death, something about stopping the boot process to avoid system damage. It won't let me get far enough to run chkdsk or anything of that nature as I can't get to a command prompt. I had a quick check through the bios and everything appeared normal there.
I checked all the fans, HDD, RAM, connections and leads, cleaned the dust out of everything, pulled off the CPU heatsink and fan and cleaned them. Nothing seemed out of the ordinary and although the HDD was not making any strange noises I thought this might be the culprit.
I bought a USB external HDD, the plan being to put that in the home PC, load new operating software onto it and attempt to access all the files currently on the old HDD via installing it in the USB external HDD case. While trying to load up windows setup, after loading the drivers it again came up with the blue screen of death. I wasn't entirely surprised but I was annoyed as I'm not really wanting to go buy a new CPU, motherboard etc just to try and work out what it is.
Any ideas on how to check whats causing the issue now? A cursory inspection of the MB doesn't show any swollen capacitors or anything obviously out of place and the CPU seems to be ok unless it's been cooked internally.
Any help or ideas on what to check now would be great. Googling hasn't helped much so far, lots of things about using command prompt and windows boot disk, none of which work for me. There is a lot of stuff on the old HDD that I want to keep and is not backed up, idiot yes I know. Help please!