I had to install a fresh copy of Windows 8.1 on my Boot Camp partition. After I installed Windows I went ahead and installed the drivers and stuff I downloaded through Boot Camp Assistant earlier.
My screen is dim now though. I have the brightness turned all the way up. I also turned of the auto-brightness as another discussion suggested.
Windows is all up to date, and I also got an update for the nvidia drivers, but it is still dim.
I found a temporary fix accidentally when I was in device manager. Under Monitors it lists only Generic PnP Monitor, which I checked for updates on. It says the driver is from Microsoft from 2006 under properties. The fix is when I disable the device and then enable it. The screen goes back to a normal brightness. However it only lasts anywhere from 1 to 20 minutes and then goes back to being dim.
What can I do to try and fix this problem?