I am facing peculier problem with my PC.p3 type,window98 se os,I am not able to install ms office,dvd r/w.each time it is giving error message during installation(some times system gets hanged and forced shut down to be done,some times error messge pertaining to window registry,some times contact software vendor etc.),same software on othe PC were successfully installed,other applications are running OK,I repartioned and format the disk,re installed win98se but again facing same problem.