"You have no access rights to install the application"

["You have no access rights to install the application"]

Here are my computer specs:

Processor: Intel® Core i7 CPU 930 @ 2.80 GHz

Installed RAM: 8.00 GB DDR3

System type: 64-bit Operating System

Graphics Card: ATI Radeon HD 5770 w/ 1GB DDR5 dedicated graphics memory

Windows Edition: Windows 7 Home Premium

The thing is this is the only game I'm having trouble with. All my other games downloaded fine and are working great. I've got Flight Simulator X, The Sims 3, Battlefield 2142, Battlefield 2, and Need for Speed Shift. I've literally run out of options...I've called HP support but all their technicians are in freakin India so half the time I can't understand a damn thing they are saying, I've tried downloading it from a site LEGALLY and nothing...still the same problems.

["You have no access rights to install the application"]

So I recently bought a brand new computer from Best Buy, bought ARMA 2: CO, brought it home to download, and it tells me "you have no access rights to install the application"? I have an HP Pavilion Elite with the Intel® Core i7-930 Processor, 64-bit Windows 7 OS, a TB of HD space, etc...basically a good top of the line computer. I don't seem to understand the problem I'm having because I read on here that people are playing the game in Windows 7 with no difficulties at all! It said that the game is incompatible with my computer somehow and I'm at a blank as to WHY...can anyone assist me in this problem? Thanks a bunch!!!

P.S. I've tried running it as administrator, using the backwards compatible program, checked for solutions online and none of them work...