How to upgrade to Nis 2010 ?

I have NIS 2009 and i have only 28 days left. NIS 2010 not ready yet.

If i renew my subscription, later i can change from 2009 to 2010  free?

I'm using now NIS 2009 on two machines both Vista, later i want to change to Win 7

2009 or 10 will work on Win 7 too or i will have problems?

Sorry for my english and thanks!