I have the games Silent steel i can run it on my Dell 2400 2.4 gig with 512 memory ,but if I try to install it on my Dell 8200 1.8 gig 512 memory it refues to install ,The message I get isc:\windows\system32\autoexec.nt. The system file is not suitable for running ms-dos and microsoft windows applications. choose close to terminate the application.) Both ***puters are running windows xp and have sp2 on both of them. Thanking you in advance for all your