Im getting weird horizontal lines that flicker and cause a weird corruption effect when I start my computer up for the first time in a few hours.

The thing is, it only happens very slightly on the desktop and heavily when i open a windows explorer window (ie my documents, pictures, or control panel. It will immediately stop when I open a program or web browser. When i switch back to a windows explorer folder it will do it again. After 2-5 minutes it will stop completely.

If I restart my computer it will not happen either, I have to turn my computer off or put it to sleep for an extended period of time.

Heres some videos

I have 2 monitors; a 1080p60hz display and my main 1440p144hz display. The 1440p display has amd freesync
Windows 8.1 64bit
Intel i5-4670k oc'd to 4.3ghz
Sapphire AMD r9 290x 8gb
Catalyst Control Center 15.7 drivers and a few older ones as well