Ehhh.. There is some wrong information in your posts Keanu, but oh well.
A few things.. As much as I hate Vista, it isn't
that bad. It really depends on the user and their uses. It just isn't as clean or functional as it could or should have been, leaving people to prefer XP over it. This led to the hype of Vista being shit, and people have blown it out of proportion.
Also, the free version of Win7 that shuts down in February is the Release Candidate. The Beta was released and you can use it, but it just does not have all of the functions that the Release Candidate or the full version will have when it is released.
Also, I believe (correct me if I am wrong though) that Win7 comes out October 22nd. The regular upgrade cost would be $120, but I read an article that if you have a college e-mail (.edu address) that you could get the Win7 upgrade from Vista for only $30. Due to you going into the Marines, you wouldn't have one, so up to you to try to find a way to get that discount.

Two things to do if you don't want to upgrade to Win7 at the exact moment. Call Acer customer support and get their help (after talking to a few Indians I am sure you will get someone whose first language was English) and ask them to send you an Acer installation CD. Or you can find an activator like Owen said.