Possibly, but you wouldn't like the results. Most netbooks have the computing power of a mid-range system from 6-7 years ago, which is why they installed XP on virtually all of them. Vista and 7 would have been too heavy.
Don't let the 1.6GHz fool you, the Atom, clock for clock, provides MAYBE as much as 75% the performance of say a Core 2 Duo. So, in the best of circumstances, your Atom CPU would be like a 1.2GHz Core 2 Duo, and in plenty of scenarios it would be a lot less than that.
Netbooks just can't handle the load of Vista or 7, it's as simple as that. Save your money, put it towards a new laptop instead.
i have a hp mini the 1000 version.. and i want to know if this can be upgraded to windows 7?
in system properties it says:
Microsoft windows XP
Service Pack 3
Intel (R) Atom (TM)
CPU N270 @ 1.60GHz
1.60 GHz. 0.99 GB of RAM