I needed to update my firmware to my dvd rw because of issues that were said to be causing problems with my computer. There was a firmware for a benq 1620 which is what my model was so I thought. I installed and now it screwed everthing up. My computer won't restart but just keeps cycling even in safe mode. I got into the bios and disabled the dvd rw. I now find out it is a benq 1620 pro which wasn't listed. What can I do??????