A friend of mine recently bought a product called PrintMaster. He had some trouble installing the software and called me up for some tech support. He was receiving an Error 1305, for which a quick Google search lead me towards the following:

… Completing a clean installation of the program will help to prevent conflicts that can occur. The remainder of this note describes the procedure…

All right, I thought a clean install, let’s read on and see how to do a clean install:

1. Place a small amount of nonabrasive, liquid soap on the shiny side of the CD or DVD.
2. Using your fingertips and warm water, gently rub the soap on the disc in a circular motion.
3. Rinse the disc thoroughly and dry it using a clean, soft T-shirt or lint-free towel. Do not use paper towels or tissue paper.
4. Install the program.

Yep.  Read the original and more here.