Hi, I was running Windows 8.1 (preview). I overclocked my 4770k to 4.3Ghz, and although it appeared generally stable, upon startup, clicking on anything would not regester. By this I mean clicking on any icon wouldn't do anything. After doing ctrl alt del, and clicking task manager it regained regular functionality. After adjusting the settings, I found all overclocks did this. Is there any solution? Thanks.