Today i was surfing the net and my dad wanted to log in to his computer account and when he tried it was corrupted for some reason. I checked all the other users and all ours worked and we have 4 accounts. For some reason my father's account was the only one that was corrupted. When we tried to log on to his User, it keeps saying it has tried to log you in but it loads the default profit. PLease can anyone help fix this problem??

Move your father's personal documents, pictures, music, videos, etc somewhere else on the drive (such as c:/dad; create a folder called dad or whatever else that you'd like to call it) & create another profile for him in the "user accounts" in the control panel. If that works you can then move his documents to the other profile's documents folder & delete the old, non functioning profile. If he has any files encrypted they will need to be decrypted. If he has any file encrypted & they aren't decrypted he won't be able to use them again.