I installed Elements 12 on a new Windows 7 laptop with an AMD FirePro M6100 adapter.
When I try to move the Premiere window the only thing that shows movement is the bottom section that has "Undo... Redo... Organizer... etc."
If I drag another window, such as Firefox or Excel, over the Premiere window, it refreshes. But if I try to move the Premiere window again, it has the same problem.
What is your exact graphics adapter driver version?
Have you gone to the vendor web site to check for a newer driver?
For 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
The driver is version 184.108.40.206 which is the latest version on their website.