It’s not really a good idea to leave your computer on all the time, you can burn the parts out more quickly or cause it to overheat if you do that. Better to switch it off by going to the Start-Shutdown procedure then switching off the mains socket and removing the plugs, when you’re not using it. And with certain operating systems such as Windows ME you can’t have it on all the time anyhow because Windows ME runs out of resources. Maybe that’s part of what’s happening.

What are your computer’s specs in terms of hard drive size, RAM, CPU speed and chip type (i.e. is it an intel pentium or not) please plus operating system.