Oh, and another thing...
Sometimes, rather than giving me the "Unable to Acess Hard Drive" message after the WindowsME bit, it actually boots up to the part where I enter name and password and click ok. Except, along with that, it opens a scan-folders-for-damage thing, because I keep shutting my computer down improperly, and as soon as I move to click "cancel" on that, my mouse freezes, and it's about then that the clicking and screeching noises start, if not earlier.
Some of the messages it's given me (on blue screens when I press Ctrl+Alt+Delete once or twice, or on black screens similar to the "Unable to Access Hard Drive" that pops up after the Compaq bit) are as follows:
"Unable to Acess Hard Drive" (this one is recent)
Something about an "Error 06 0000"
Another something about an "Error 000000C3"
A message that, I remember, had the word "virus" in it and included something about a "KRNL386.exe"
And another Error message about an "Error 0E 0028 C00AEF82."
Any clues there about what's going on and how it can be fixed? And suggestions? I'm welcoming all the help I can get, at this point.