I was wondering if someone can tell me the best DVD ripper for windows vista?

Here are a couple

Magic DVD Ripper - rip DVD to hard drive or blank DVD (http://www.magicdvdripper.com/)

AoA DVD Ripper, Convert DVD to AVI, DVD to iPod MP4 (http://www.aoamedia.com/dvd_ripper.htm)

Run as admin

I normally use DVDShrink, if it fails, CloneDVD, it that fails, AnyDVD

Thank you magic dvd worked fine.