Can't set resolution above 1280x1024.
I'm trying to get my resolution to 1900x1200 on a 27" monitor, the disc that came with the monitor isn't compatible with my system yet it had worked before I re-installed windows, thanks for your time.
"the disc that came with the monitor isn't compatible with my system"
did you upgrade to windows vista or 7 from xp? or from 32bit to 64bit? if the software drivers aren't compatible because of such a change try looking online for your drivers. you're probably looking for graphic card drivers (ati? nvidia? go there) since monitor drivers normally arent required.
"I'm trying to get my resolution to 1900x1200 on a 27" monitor,"
you are sure it is a 1900x1200 native resolution monitor? i think its a driver issue but i have to ask (since you cant set a resolution higher than the monitor supports itself).