Sweeper: Guru3D - Driver Sweeper
Download AMD 10.11's: ATI Radeon
Go to add/remove and uninstall ATI drivers
. Choose express uninstall to get rid of everything. Answer yes to uninstalling CCC. Reboot when prompted.
As your system reboots, tap the F8 key to enter Safe Mode. In safe mode run driver sweeper and place a check in the ATI box. Run it and reboot.
Install 10.11's. You should be good to go. You don't need .net, the drivers come with it.