I had a different solution to this. If your PC has firewall enabled. In Windows 7, you need to go to: Network and Sharing Center > Windows Firewall > Allow program or feature through Windows Firewall (top of sidebar) > then click Change Settings Once you clicked that, check the boxes for Wireless Portable Devices. It depends on your network if its Home/Work or Public connecttion. Then press Ok. Then try to pair your device to PC again via wifi. It should work now.
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