MSCONFIG.EXE not allowing me to save change! I AM ADMIN!

I have looked for a few hours for the last couple days for an answer to this question:

I am the Administrator on my computer. It is on a small home network with 1 other computer with an Intellinet Wired Router. I am running Win XP SP2. If more specs are required please ask.

But anyways, when I try to use MSCONFIG.EXE or a program called AutoRuns(which is basically an easier to understand msconfig) any changes I make revert upon reboot and my selection of normal startup from the general? tab of msconfig. I get an error message to the extent of “an access error has occured logon as administrator or go to your admin” or something to that effect.

I’m lost! Please help.

Thanks in advance
Mike