So my computer is all fine and great, I turn it off and go to BED. I come home (now) only to find out when I booted it up, the resolution was messed up and way too big. I figured no big deal. I go to change it. But now I find my 1440x900 option isn't even AVAILABLE anymore. I restart to see if that does anything, and nope. Half of my original resolution choices are now missing from the menu and I'm stumped.

The SCREEN is an Acer P221w, and nvidia gtx 260 is the VCARD. I'm pretty sure it wouldn't have anything to do with another component.Try reinstalling the graphics drivers and also are you using the windows in-built resolution switcher or the nVidia one? I tried the windows first and when that didn't work, went to the nvidia one, It didn't work either.
I'll try reinstalling drivers.Yeah, reinstalled, got nothing.hmm, is there an option somewhere in the nVidia control panel to restrict widescreen modes?I don't think so. I mean my res is currently SITTING at 1360x768. And theres a few other widescreen modes.Okay then I have no idea sorry :S other then finding monitor driversDid you uninstall current video driver before installing new one?
Also, try to re-seat video card.