Ok if it is just the registry that wont load it is a virus that you have on your computer and i am 99% sure about this. There are a multitude of ways to solve this, but firstly if you have virus software on your system do a full update then run a full system scan and see if it comes up with anything. ALso download and run the program 'Spybot search and destroy' and update and scan with that. It is a virus so any other forums that are just giving you options to re-enable the registry editor are not giving you the best option ebcause the virus is still present on your syste, make sure you do the full system scan after update in safe mode.
Please let me know how this goes or if it finds anything.
With regards to your laptop drive, they are very fidly and dependant on how old your drive is it could of just reached its end, it might be worth looking into getting a new one? how Old is it?