Ok, vista for the very first time!

Alright, i just installed windows vista sp1 on my computer, mostly to learn more about the OS, because ive faced some stuff on some friends laptops that had vista, and couldnt solve much because i didnt knew well the OS.
Well until this moment vista has surprised me. Its very fast and stable, even on my single core machine (maybe due to its 2gb).

I have a oced athlon 3500+ (2.5ghz) with 2 gb (4x512 DDR1) and 160 gb SATAII
My graphic card is a high end one...from 2001. A Geforce 3 ti500 64 mb. (I RMA'ed my 7900GT, im still watting for it)
Nothing wrong with that apart that i dont have aeroglass or some other small effects like 3D window flip.

My questions are:

1-Its ok than i dont have aero glass, because the gf3 only suports ps1.0, and aeroglass requires ps2.0, but why not 3D window flip? Is there any option to turn it on? Or it just wont run on this card? The 3D chess game does

2-What firewall\antivirus do you use or recommend?

Thanks in advance.

2. AVAST OR AVG - both free and better than Norton.

If you don't want to pay then AVG Anti-virus is ok for basic protection and Comodo Firewall 3.0 will work under Vista. Comodo Firewall is considered a match for even the best payware firewalls.
www.comodo.com

I personally use Kaspersky Anti-virus because it can deal with a wide level of Malware threats and good deals can usually be found if you shop around.