Try setting all 3 of the .exe's to run with admin permissions.
Do you have any virus programs that may be stopping the process and need to set up some excludes?
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit, Screen resolution 1680 x 1050.