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Hi there, I'm Sean. I'd be glad to help you.
First of all, do you know the model number of your TomTom? What type of TomTom device do you have? A GPS?
You should be able to find the model number printed on the back of the device.
I'd be glad to point you to the correct software and drivers once I have more information.
Sean @ Sean T. Custom PC
For this device, it looks like you'll need MyDrive Connect. Follow this link and look under MYDRIVE APP FOR WINDOWS:
Download that and set it up and it should be able to connect to your GPS when you have it hooked up.
Let me know if this works for you, and if so, please rate and hit accept. If this doesn't work, just let me know, and we'll continue troubleshooting.
Sorry about that, sometimes it works out that way. Sometimes you end up finding the information you need without help.
If my answer helped you though, please accept and rate, and I'd be glad to help you with any other issues.