if i change it back to the regular clocks, voltages it has no problem going back in even after the failure. If i adjust the clock but leave the voltages alone, same thing happens! it seems if i adjust the clock the slightest bit it wont get in windows, will try to underclock it and see if it still has this problem, if its still there then its definately my windows!
and no i havent tried going into safe mode/repairing after overclocking, will try that now!