Being that you haven't tried anything it could be a simple case of he missed a step. Or something to do with the way his network is setup. Although I have to say I have never encountered this issue before.
OS: Windows 7 64-bit Case: Commander MS-I
Mother Board: GA-880GM-UD2H CPU: AMD PhenomII X4 965 3.4GHz(Stock) RAM: 16GB GPU: GeForce GTX 550 Ti