Windows Vista Aero Desktop

[Maksim]

I recently installed Windows Vista Ultimate Edition on my pc and it seems to be working great and evertything is awsome i was amazed. But when i went to the personalization settings and i wanted to enable Windows Aero and it is not there. I researched online and even talked with the microsoft representative, They told me that my computer does not support it.
But when installed vista the drivers that came with vista i have Aero Selected. But when i installed the manufactorers drivers for nvidia it dissapeared.
System Specs are:
Video Card: 128 mb DDR AGP
Ram: 768 MB DDR
Processor: 1.5 Ghz AMD Athlon 1800+
Motherboard: Ga-7DEX (gigabyte)
Hard Drives 2 by 500 GB each. IDE/ATA
I need as much information to convince my dad that this is a good deal that i got over ultimate. He doesnt see any change please help.

[Calum]

What actual video card do you have?
You may just need to wait for an updated driver.

[dl65]

Maksim........  I would have to agree with the MicroSoft rep you spoke with .......  Your vid card is the the minimum ....... You should have a minimum if 1 gig of ram......... A faster processor would be a great asset as well.......

Did you run the Windows Vista upgrade advisor ?
http://www.microsoft.com/windows/products/windowsvista/buyorupgrade/upgradeadvisor.mspx

It appears to me that you may be able to run Vista , however it's not doing even close to what it could do ........

I could be right out to lunch , with my comments but thats what I see.

dl65