I have a HP Pavilion zv6130us laptop, my dvd drive on my laptop is defective so I bought a replacement part. The drive is supposedly easy to remove and install, with only one screw holding it in place. but that screw is rounded, the head where the philips screwdriver fits in. I think it's a PM2.0x7.0 screw. Now how can I remove that screw now and what tools would do the job. I do have a small screwdriver kit, used for small applications like this. but since the screw is now rounded, I can't do anything.