64 Bit? or only 32?

I have Windows 7 64-bit, and I run WoW, Curse and Vent with no issues. Your system should work just fine.

I realize this is a bit oldish, but according to the GMs here (http://us.battle.net/wow/en/forum/topic/4488638967), the 64 bit client should be up and running.

World of Warcraft is a 32-bit app. However Windows 7 64bit have full support for almost all 32-bit applications. It should run just fine on your system.