Good Morning

I have an msi wind u135dx that I received as a present from my wife.

It is a good little machine runs quickly and is reliable,however I currently own three of Microsofts Operating Systems

I have Windows XP (Shipped with the machine) and Windows Vista Ultimate and Windows 7 Home Premium.

I am not sure which would be best to use on this computer given it's specs, I have upgraded the memory to 2gb but my concern lies with the Intel Atom's 2 cpu 1.6 and 1.7ghz processor's ability to runs these operating systems.

Obviously I would ask Microsoft,however I think,no in fact I know what they would say lol Windows 7.

All help and opinions will be greatly appreciated.

Thank you and Happy Easter.