These are the official minimum requirements recommended by AC. Unlike Microsoft where you will usually want more, this is a bit too much probably. Intel and AMD are certainly better than Celeron and, in the future, I would stay away from Celeron processors. But, a Celeron 1.8 processor will be fine. Hard drives are cheap, but you don't need nearly 160GBs. And, Wendell is correct. RAM is key.
Amazing Charts Minimum System Requirements
Processor: Intel or AMD processor running at 2 GHz or faster - most processors made in the last 2 years will do just fine.
OS: Windows 7, Vista, XP, SBS2003, or newer (with latest Service Packs). We strongly recommend the PRO version of these - especially for the "main" computer or server.
RAM: 2 GB or more - if you use Voice Recognition you'll want at least 2 GB.
Screen Resolution: 1024 x 768 or higher - this means some netbooks with screens of 10.1" or less will cut off some of the windows.
Hard Drive: At least 160 GB or more.
