Or have a look at the click here support/knowledge base site under your Windows O/s.
Personally removing Zone Alarm in windows doesn't fully shift it from your registry filles etc.
If you know how, Formating your Hard Disk Drive and reinstalling Windows 98 will put it right, unles its a hardware item error.
If you have added some new hardware recently it may be related to that. But most likley the removing of Zone Alarm as upset your system.
Try going to the Start-Run in desktop and type in sfc to see if any system files have been taken away, then use the disk clean up in accessories,