Check if you are able to download latest drivers for your AOC monitor through Windows Updates. To know how to do this, refer to the guidelines mentioned on the link below and see if that resolves the issue:
http://windows.microsoft.com/en-us/windows-8/all-drivers
If the issue still persists, you can check if the following link helps:
http://us.aoc.com/support/downloads
If the issue is still not solved, you are advised to contact AOC technical support by using the link mentioned above for assistance.
Hope this will help you.