Error code 0×80020042 when trying to …
The solution for rawsaxy:
Well, after making the mistake of adding permissions to internal files on the main hard drive and system folder, I ended up with the Gray Screen and Restart Loop problem. I was able to backup the important files before doing an Erase & Install. Everything is working better than before now. I left the Mac OS at 10.5.2, and guess what? I was able to burn a DVD in iDVD ’08 now! Thank you Lord!
via Apple – Support – Discussions – Error code 0×80020042 when trying to ….
Another two solutions are from this thread.
1. Try another kind of media
2. Use a Computer CD/DVD cleaning pad.
Both of this solutions fixed the problem for two posters.

