Changes to msconfig and page file: laptop wont boot anymore

Help! I just recently changed the page file to 1.5x my RAM and set both fields to the same value, and made it so that my laptop would boot using 2 cores, and now I keep getting blue screen with "Bad system config info" and looping with startup repair. I was able to get into safe mode and change the settings back, but now I can't get even get into safe mode either, I get the blue screen. I am running windows 7 premium with an ASUS intel core i7 processor. I realised afterwards that A) it was a dumb idea to mess around with stuff i didn't properly understand, and B) that I have 4 cores, being an i7, and that choosing 2 probably has caused all of this to happen

Thanks in advance!

 

Thanks very much for the hasty reply. I have given my computer in to be looked at by a professional, and hoping that he can undo the changes and put it into working order. Trying to avoid system restore if at all possible. System restore is something I can do right? I shouldn't pay him to do it? I heard it was accessible through an alt+f? command when your computer boots up.

Cheers