watch does not connect with computer

Are you getting any error messages when you plug the watch in or is it being recognized at all? Does the clock face change to a battery charging icon (which indicates it is getting power so there is a partial connection)? A few things to look at (and I apologize if some are very basic, but it is best to get past the obvious issues first):

1) Are you plugged directly into the machine and not a hub?
2) Does the port work, can the computer detect other devices (like flash drives) in that port?
3) Is the watch firmly snapped into the cradle and the USB plug firmly in the port?
4) Is the USB port free of any debris or blockages?
5) Is the Connect software running (is there an icon for it in the notification area)?
6) Did you install Sports Connect, not MyDrive Connect? It is downloaded from tomtom.com/123
7) Do you have administrator rights to the computer?
8) Is a firewall or antivirus running that is blocking the software from connecting to TomTom (try turning them off before docking the watch)?
9) Does the computer have a good Internet connection (Internet is required to sync)?
10) Can you try installing it on a different machine to determine if it is an issue with the computer versus the watch?

Is there any damage to the cable or the port on the watch?