Strange graphics issue with Windows 7 – multiple user accounts

I had the same problem on Windows Vista 64-bit. After some Googling, I found nothing but I did notice that people with Windows XP did not have the same problem. Anyways, here's my solution:

For Windows Vista/7 users, you'll need to run the game in Windows XP Service Pack 2 emulation mode. Navigate to your Steam CoD installation: C:\\Steam\steamapps\common\call of duty Right-click on CoDSP.exe and click Properties In the Compatibility tab make sure the "Run this program in compatibility mode for:" is checked and change the drop-down to Windows XP (Service Pack 2) Hit Apply and the OK

After this, I was able to change the brightness from in-game without a problem. If this still won't help, try running it as an Administrator. You can follow the above steps but the checkbox is further down in the Compatibility tab.

One of the problems is with your graphics card. The Radeon HD 4250 is a low end card, nowhere near powerful enough to handle a game like Sims 2 at high resolutions. AA and AF are pretty demanding on graphics cards. I would recommend disabling them or reducing them to the lowest setting to improve performance.

As for your resolution problem, you can try the following solutions:

SOLUTION 1

SOLUTION 2