Ok so I had to switch out my hard drive into the exact same model. Everything seemed fine until the built in wireless card didn't work. So I did some investigating. I found out that this message displays "This application has failed to start because MFC42u.dll was not found. Re-installing the application may fix this problem." I was hesitant to install it off the internet because most are for windows 98 or something. I have XP. But I really don't have ANY install disks for anything on here. S o any help would be nice, thanks!