Hi , my pc (sony all in one) powers on , but then goes into a error message - scanning and repairing c drive , where it gets to 65% then stops..i have tried F8 where it goes in diagnosis and attempts to self repair mode..and then stays in that mode. Is there a simple process to folow that may help..at some point it this it gave me the option of not following in self fix / scan and let me in..(alas no more..!!) and i was able to get into documents and programs and even go online..but after using the change user option in no longer allows me to do this...so stuck in the scanning / checking cycle ..any advice gratefully received..Thanks guys