I have Asus k52f laptop. Originally came with Windows 7 . I upgraded to Windows,,10. But when i was not home. My husband and son tried to turn laptop on. But could not figure out password. Next thing I noticed is it would not start up. Show error code...(don't remember what) I was stuck.but next door neighbor said he works on computers (big mistake) told him nothing important on it. Just wanted to be able to use it again. Next he brings it back with Windows 8 on it. And every thing else Gon.all good stuff came with it when I purchased it. Now my memory c: is full can't update windows can't reset it . Im not good enough to figure out how to do or fix anything on it. HELP