Drive failure causes an abnormal resolution
Here, for example, in Windows 8, first locate the computer icon in the system, as shown in the figure
Then select "Computer" and click the right mouse button, then click the "Admin" option, as shown in the picture
Next, select the Device Manager option in the left pane of the Computer Management interface, as shown in the figure
Then click "Display Adapter" in the right pane to check if there are any exclamation marks or a question mark, if there is a clear card driver is not normal. As shown in the figure
The video card driver is not normal, you can manually reinstall the video driver. If you do not have a graphics driver, and do not know what the specific graphics card, you can use some third-party software. Here take "Drive Elf 2015" for example. First turn on the Drive Wizard 2015, the software will automatically detect the system driver. Waiting for the software to detect the completion of the home page to find the graphics card, click "Upgrade" as shown in the picture
Then in the Upgrade Driver wizard page, according to their own needs, select the appropriate driver, click "Next", as shown in the picture
Then click "Resolve Now" as shown in the picture
Wait for the download to complete, click "Install", as shown in the picture
After waiting for the video card driver update to complete, restart the computer, and then try to adjust the resolution.