Ok so after I downloaded the file from nodevice.com, I did an add hardware search and the computer seem to have found hopefully the right driver, and it found the compaq monitor that I'm using. Things seem to be back in order display-wise.
The .dll problem though still exists on the two users, I'll fiddle around with that as soon as I calm down a bit and get some other stuff done. Also a little scared on restarting.