need help with acer laptop grandson has been downloading cheats for his games , well looks like he downloaded for the last time when I turn laptop on it says loading windows ,the goes into start up repair, it now says windows cannot repair this computer automatically press finish, when I do this it starts up again and does the same thing ? I have no task bar ,start , or close ,some one told me to press f8 on start up which I have done to no avail I just get a load buzzing noise every time I press it like an alarm,it is a acer aspire 1640 . any help would be goo . thankyou .