I don't know but it's nothing Microsoft makes. Vista needs 2 gb of ram just to crash, never mind run. A 2 gb hard drive wouldn't supply enough space for the 10 gb virtual memory vista needs to dumb all the BAK files it makes.
When I bought my wifes $430 laptop I was gonna strip Vista and use xp, but I cleaned it up, removed a lot of stuff that she didn’t need (the anti-virus software kept WI-FI from working at first) and the thing flys with two gig.
I was actually surprised.