My nMP installed Winclone 4. THe WIN8.1 boot camp was running normally. Did a copy image of WIN8.1 from bootcamp and restore it into an external WD thunderbolt hard drive. Running Win 8.1 on this external hard drive the screen keeps on flickering every five minutes interval. occasionally an error message appears Quote: AMD Catalyst Control Center Host Application has stopped working Unquote Any solutions to this.