This post provide computer help if you are unable to change your display settings, the display adapter may be corrupted.Try the following steps to resolve this issue:
1. Open System Properties in Control Panel and click the Hardware Profiles tab. Highlight the hardware profile that is marked (current), click Copy, then enter a name for the new profile such as "Test."
2. Restart the computer in Safe Mode. To do this, click Start, click Shutdown, click Restart, press F8 when you receive the "Starting Windows" prompt, and then click to choose Safe Mode from the Startup menu.
3. When you receive a prompt to choose a hardware profile to boot into, click the Test profile and allow the computer to boot into Windows.
NOTE: This hardware profile will allow you to make changes to Device Manager without damaging the original hardware configuration.
4. Open System Properties again and click the Device Manager tab.
5. Click the plus sign ("+") next to Display Adapters to view the list of device drivers.
6. Click the display adapter that is listed and click Remove. Click OK when you receive the "Warning: You are about to remove this device from your system" prompt.
7. If there are multiple display drivers listed, do the same steps for each device.
8. Close System Properties, then click Start, click Shutdown and then click Restart to restart the computer.
9. When you receive the Hardware Profile prompt again, click Test. Windows should detect a display adapter during startup and you will receive either a prompt to restart the computer to complete the device installation, or a prompt to provide a manufacturer disk to install the drivers.
10. When you restart again, click the Test profile again and try adjusting the display settings from the Settings tab of Display Properties in Control Panel.
11. If your issue is resolved, then you may delete the Test hardware profile from System Properties and perform the same set of steps to remove and redetect the display driver when you restart into your original hardware configuration.
12. If these steps do not correct the problem, then remove the Test hardware profile and see the section in this article entitled "Contact the Manufacturer of the Display Adapter."
