Browsing this forum for a while and asking the same question to some extent it seems this is the most common reason for a topic here.

Can I run this game?
Read the minimum specifications. If you can run most other fairly current games (e.g. Bad Company 2, Mafia II, et. al.), you can run Crysis 2, on some setting.

or visit this lovely site http://www.systemrequirementslab.com/cyri/

or visit this lovely site http://www.systemrequirementslab.com/cyri/
That site svcks. Its outdated and is almost always wrong.