My 2 cents on msconfig.
There is nothing in startup that XP needs to run normally. When you do a fresh install of XP there is nothing in startup and the system runs just fine.
It's when you start adding software that things begin to build up. Many of the startup items are not needed and only waste resources, some are required if that software is to perform properly. CloneDVD and AnyDVD will work without interference without anything in startup. You don't even need AnyDVD in startup, just make a shortcut or access from start\programs.
When I burn I have nothing running in startup, I even disable my Logitech mouse software, only thing that doesn't work with the mouse then is the 3rd side button used as double click, hardly use it even when it's running.
Many may consider this as excessive and things may work perfectly well with all checked in msconfig for some, but my philosophy is an ounce of prevention may save you a pound of aggravation.
To begin, I suggest you write down everything that you do have checked in startup, then hit disable all, reboot, and do your burn. After you're done burning check back what was originally checked and you're back to the way it was. You should follow mukooh's advice about finding out what is necessary and what is not.
I have deleted all unnecessary entries in my registry so all I do is enable all or disable all while burning or not burning. I would never suggest somebody unfamiliar with the registry go in there and make changes, you can screw up your operating system.
I have been using a small utility for several years that works better than msconfig, and is great for those afraid of registry tampering.
It has a delete button that removes the startup from the registry for you, if you removed something in error, go to the deleted tab, right click on the entry, and select send to and it gives you a selection. The default is HKLM/run, this is hot key local machine/run. This key is where the majority (not all) of startup programs reside.
The program is named "Startup Control Panel", after installing you will find it in the control panel only, with its name "Startup" with a computer icon.
[font=Arial Narrow]Anyone interested in using this very small program (59kb) you can download it here, it's free, and never expires.[/font]