Linking errors can be a real pain, here is what I have done several times to get Ti Connect working. At least for me, if you follow these directions, all should go well.
First off, unless you plan to permanently use TILP, don't install it. You will just create lots of driver problems.
1. Uninstall Ti Connect.
2. Go to c:\windows\system32\drivers\ and delete the libusb0 and silverLink driver. (that's not the exact name of the silver link driver, but it's close)
3. Plug your calculator into a usb port that you know it was connected to at one point
4. Control Panel>System>Device Manager and uninstall your calculator, (it may take some searching, it's supposed to be in libusb devices)
5. Disconnect the calculator from the computer
6. Repeat 3, 4, and 5 for all of the usb ports you think you might have used
7. Do 3, 4,5, and 6 with your silver link if you have one
8. Restart computer
9. Install Ti Connect
10. Plug in your calculator and let it install drivers
And you're done. If all went well, you shouldn't have problems for like 2 week! (Ti Connect is very finicky with direct usb, that's why I use silverlink)