this sounds like a problem between vVsta & your DVD burner - I've had fab v4 workiing fine on a new vista home premium PC, & many others here have used v4 with Vista.

can you test your PC by writing to a blank DVD using other software ?

posting a DVDfab burn log here would also help.

PS XP is actually faster than Vista at most things - including reading & writing DVDs, if 2 PCs with the same hardware specs are compared.