So, I used to have an issue where every once in a while when I started my computer my hdd wouldn't be recognized. Now, since upgrading to 8.1 my computer will randomly lock up. All applications will be running fine but it acts like windows desktop manager has quit working but yet it won't notify me of the case. Is this the signs of something going bad like HDD? An issue with windows 8 (like I think it is)? Or something far worse like a virus?