|Here I am again.|
Your main concern is probably your personal data.
If you don't already have that backed up you are taking a big risk. You should maintain at least TWO copies of any data you wish to keep.
Use a flash drive to copy the data to another computer and burn it to disk there. Then you will be free to perform the restore. Chalk it up to experience.
In the future I suggest you either use Windows uninstaller or if the program has its own uninstaller use it. They are there to prevent the kind of problems you now have.
The issue with the optical drive is probably either ASPI layer drivers or the upper and lower filters. Trying to fix that now will no doubt consume more time than the other option.