Win98: distorted Icons?

[cococola1]

Can anyone tell me why the Start button in Win98 turns white or looks scratched up after 10 minutes of booting up? Also, the vertical Windows98 logo gets scratched up too. Any fix to this?

Thanks
-Albert

Win98 SR2
AMD K6-3 428
280MB SDRAM
eVGA GeForce2 MX