It's also become SLOWER than anything.

when it finally starts back up, and I send my error report, it automatically takes me to the Microsoft website and tells me that it has to do with either RAM, HDD, CPU, or Power Supply.

I know it's not the HDD as I already replaced them when it failed just this year.

I'm at the end of my rope and am just about to shoot the *censored* thing.What happened before this started?
What protection do you have?
What are your system specs, and make/model if it is pre-built?worked fine before this started happening.

Norton and a surge protector.

Compaq presario S4000V, with a, early p4, 80 GIG HDD, ~1GB RAM, that's about all I can say off the top of my head.
Dload and run MEMTEST to test the RAM...let it run a few hours. Any errors mean the RAM is bad. You might have to test each stick if you have more than one to FIND the culprit.

Even though it's a new HDD it can't be assumed it's not the problem so DLoad and run the HDD manuf. diagnostics just to rule that out as a possibility.

As far as the PSU the only WAY to find out is by borrowing a known good one of the same or greater wattage and swapping it in there.

Good Luck and let us know.