PC as Bluetooth Headset for iPhone

I am trying to set up my computer as a headset for answering/making calls for my iPhone 4S. I have connected my iPhone through bluetooth, and can listen to music and create keyboard inputs, but cannot use Handsfree!

I have all of the services enabled for the iPhone:

I don't understand why my PC cannot act as a bluetooth headset, as Hands-free is selected! I have the latest bluetooth drivers installed for my computer. My guess is that it may be two drivers not working correctly (seen in Device Manager):

Could these two drivers (MAP MAS-iOS and Wireless iAP) not being installed be the cause of the problem? I have been searching for these drivers online and cannot find them.