For some reasion Lime Wire restarts my computer without any warnings or errors as if i just hit the restart button on my tower.

I will be sitting their with it running and bam, computer just restarts.
Last night I left it running and woke up to a freashly restarted computer.

All my drivers are up to date.
I have all the windows updates.
There are zero viruses on my computer.
I have a virus scanner, with it on or off Lime Wire still restarts my computer.
I have a firewall, with it on or off Lime Wire still restarts my computer.

My current computer spects are.
Windows 98 SE
256 mb ram
350 mhz cpu
Voodoo5 5500 grafics card
Sound Blaster AWE64 sound card