What is your exact brand/model graphics adapter (ATI or nVidia or ???)
What is your exact graphics adapter driver version?
Have you gone to the vendor web site to check for a newer driver?
-If Windows, do NOT rely on Windows Update to have current driver information
-you need to go direct to the vendor web site and check updates for yourself
ATI Driver Autodetect http://support.amd.com/en-us/download/auto-detect-tool
nVidia Driver Downloads http://www.nvidia.com/Download/index.aspx?lang=en-us
Display driver & Baddriver http://forums.adobe.com/thread/1370916?tstart=0 may also help
IF you have dual graphics adapters, common in laptops, read below... otherwise, ignore this part
Dual video problems (some for Premiere Pro, but the idea is the same)
-link to why http://forums.adobe.com/message/4685328