Kdbsync can be an asshole....

Had similar issues on a system that had an ATI card in it previously and I then upgraded to 2 x 7850's.
Can only assume it doesn't remove everything and causes a driver conflict of some sort.

Can you try....

Open Control Panel>Programs and features
Click on AMD Calayst Install Manager then click Change
Click Next on the welcome screen
Click Uninstall Manager then click Next
Click Custom then Next
Check box next to AMD APP SDK Runtime then click Next
Click Finish

Then try reinstalling the SDK from scratch.


Let me know how you get on.