Linux – How to connect to VPN from the command line in Linux

I do not have a windows box handy, but in advanced TCP/IP settings there is a checkbox that says "Use Default Gateway on Remote Network". This will do what you need.

Double-click My Computer, and then click the Network and Dial-up Connections link. Right-click the VPN connection that you want to change, and then click Properties. Click the Networking tab, click Internet Protocol (TCP/IP) in the Components checked are used by this connection list, and then click Properties. Click Advanced, and then click the Use default gateway on remote network

Try opening Network Connections from the Control Panel (Network and Sharing Center > Change Adapter Settings), go to the VPN Connection adapter, right-click > Properties > Networking tab > Advanced > untick "Use default gateway on remote network" from the IP Settings tab.

Try and see if it works. I've had the same issue before and that fixed it for me - dropping the Wireless connection on a x64 Win7 client.