(hayabusa626 @ Oct. 17 2006,13:03) Windows ME
I would at least backup any data you have on it to a USB drive. Sounds like the drive may be on its last leg.
The Compaq's usually came with a diagnostics disc that you could run to test the system for bad components. Do you have that?
This will at least let you know if the RAM or hard drive are going bad. The power supply is another thing that can cause lockups if it is going bad.