strollin said:
I have Win 7 installed on three of my family's netbooks that have 1.5G of RAM and it runs very well, no issues or disappointment in performance whatsoever.

I'm not sure where you can buy and then download a copy of Win 7 but I see the boxed version still for sale on various sites such as Amazon.
Don't buy software from Amazon. They and their Marketplace vendors (especially the latter) have been known to sell bogus copies. NewEgg would be safer.