I'm glad, your computer is running better. We cleaned a lot, and this is all we can do for now, short of some hardware changes.
As for Start menu, personally, I hardly use it to launch programs. I use my Desktop, where I created folders like Utilities, Multimedia, Maintenance, Security, etc. This way, I know exactly where what program exactly is located.
As for Canon...do you mean printer? If so, almost everything is to be found on-line. No need to pay for CD. Depends on what you want.