One of my win98 has the same problem. Running in safe mode everything is fine, no freezing. when it starts in normal mode, it need a long time to display image. When the computer desktop icon show up, a pop up screen "Browse Setup installation Wizard" installation program display, it asks me to click ok or cancelled to continous. I move the mouse pointer to clicking either one, no response (System freezes)/click Ctrl-Alt-Del (Blue screen).I have to turn the power off and restart. I beleive the problem come from video driver or ram. I restall new driver and upgrade the ram, it still not working.
I try to disable the pop out installation program screen when startup but not success. I went to Msconfig, control panel add and remove program or searching Dir on C drive, I am unable to located it. How can I disable it when next time win98 start up. Any advise ?