Can this pc run arma 2?
Yes, that PC should run the game just fine. The recommended specs for ARMA 2 are; Windows XP or Windows Vista Quad Core CPU or Dual Core CPU (Intel Core 2.8 GHz, AMD Athlon 64 X2 4400 + or faster) 2 GB RAM 10 GB Hard Drive Space Nvidia Geforce 8800GT, ATI Radeon 4850 or faster (with Shader Model 3 and 512 MB VRAM) Looking at the spec that your PC has, which is considerably higher than recommended, you should have no trouble.