That beats out my laptop... I get a 2.7 for the Windows Experience Index.
Wow, seeing as yours is a 64-bit and mine's a 32-bit, I would've expected the opposite.
It's not that much of a difference, though.
About the RAM amount. You mentioned it has onboard graphics...that's most likely the reason why it doesn't list a full 1 GB RAM.
Yes, most likely.