Ammo
Methinks something booting up when you post your computer. I remember saying that you use win98. If so you can do this at startup to disable anything that you don't want to boot when you post your PC.
When you start PC. Select run.......in the textbox type in msconfig. You will get a binder of folders. On the far right of this binder is the start tab. Select the start tab and you will get a dropdown menu of programs that boot up with your PC. On the left side of the list is a box with the name of the program to the right that is booting with your machine. As you scroll down, everything that has a checkmark in the box at the left is booting when you boot the PC. Simply "uncheck" what you don't want to boot. Things like Internet explorer, Systray, you want to boot when you start. Anything you see that doesn' appear to be anything YOU loaded, uncheck.
If you're unsure, just uncheck one or two. After you make these changes Win98 tells you computer must restart to effect changes, select yes. The PC will reboot without the programs you disabled in the startup tab of the RUN folder.
If something goes amok....you can always select run, type in msconfig again and edit your changes.
This should solve your problem
Hajo