Whenever I start a program or run a installation, as I am going through the process the windows just disapear. Like it closed the program without doing anything. I am running win 98 SE. The programs are PC Anywhere & Winfax, which I am trying to re-install because they keep comming up with illeal operations. I also tried to install systemworks and as I go through the screens all of a sudden it all disapears. WHat could this be caused by?

I reinstalled Windows 98 se over existing and still the same problem.