try blowing into it and then try reconnecting.

btw, I thought aeTIos was deleted because it was a duplicate account. 

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)

I have the same problem with TI Connect. Im on the current version with an 84+ 2.43

Like they said, use TiLP. I get the same error messages with TI Connect, and out of the 5 different computers i use it on, only one of them even recognizes my calc.

TiLP is way better

What error do you get? Sometimes, there is enough memory on the calc but not enough empty 16 KB flash sectors on the calc to fit the app in. In that case the best thing to do is reset the entire memory, send back the largest files first, then the smaller ones afterward.