Karafun cause some bad issues on my XP system. Not only did it not properly play and display my computer had functional issues and I believe Karafun wiped out Sonic Digital Media, Sonic My DVD Plus and Sonic Record Now programs. These are still on my computer but are now missing parts so they do not operate properly and lock up my resources until I force a shut down by holding the off button. That's whay a few weeks ago I was looking for a good CD writer software and took some recommendations from these forums. I could not write files to CD since Karafun had it's way with my system.
Uninstalling Karafun got everything back to normal except for my Sonic stuff.
Just my experience.