I have been using Windows 98 on an older Pentium 3 using ABIT Siluro T400
Graphics card for the past 4 or more years and my PC has now developed a
'pixel problem'. Images become corrupted - sort of 'pixel leaking', small
blotches of colour left on the screen after moving Windows Applications
around. Not all the time but sometimes minimal and sometimes a complete
mess.

I can't fathom out whether it's my graphics card malfunctioning, my
motherboard malfunctioning or something 'simple' like corrupt drivers.

Can anyone please advise me on how best to trouble-shoot this problem?

I have already uninstalled and reinstalled the Graphics card software.

thanks in advance

Rick