Do you happen to have Zone Alarm installed on your computer? Zone Alarm has been known to cause conflicts with this driver.
If not, or that isn't the issue, you can right click "my computer" then "manage" then click "device manager" then right click your computer at the very top of the device tree, then "add legacy hardware", click Next then select "Install Manually from a list" then click next. In the list select "Network Adapters". Once all the hardware has loaded select "Microsoft" from the Manufacturer column and then scroll all the way to the bottom in the network adapter column then select turedo tunneling adapter and then next to install.