Went to the Canon Support site and although there is no updated software for WIN 10, I checked what was available in the Win 8.1 software. There is an 'EOS Utility Updater'. This installed 'EOS Utility 2' and now it is working just fine.

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1. Select the “Software” tab Find the “EOS Utility” and click the “SELECT” button File description will open and click “I have read and Agree to terms” message once you agree the download button will turn red and you will be able to click and download the utility.Note: If EOS Utility Software is not listed.
2. 70D: Wireless transfer images to computer. IMHO Canon has not done a good job with the 70Ds Wi-Fi software. You need to have the EOS Utility with WFT Pairing.
3. Download drivers, software, firmware and manuals for your Canon product and get access to online technical support resources and troubleshooting. We use cookies to provide you with the best possible experience in your interactions with Canon and on our website – find out more about our use of Cookies and change your cookie settings here.
4. When operating the camera remotely using EOS Utility, perform the operations as follows before starting the Pairing software. If these operations are not performed, the Pairing Software may not start.
5. Sending images to a computer (Wi-Fi function) (EOS 70D) Solution. Sending images to a computer (Wi-Fi function) (EOS 70D) ID: EN 2. Use the provided Pairing Software contained in the bundled software to establish a connection between the camera and a computer.
6. Canon software EOS Utility not working? Here is how to fix Tech & Design. Unsubscribe from Tech & Design? Cancel Unsubscribe. Subscribe Subscribed Unsubscribe 104K.

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1. Type troubleshooting in the search bar.
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4. Clickon Hardware and Devices.
5. Follow the on-screen instructions.

Step 2:Remove and reinstall all USB controllers.
1. Press Windows key + X, click Device Manager.
2. In the list of hardware categories, find and expand Universal Serial Bus controllers.
3. Right-click every device under the Universal Serial Bus controller’s node, and then click Uninstall to remove them one at a time.
4. Restart the computer, and let the USB controllers get reinstalled.

Also refer (applies to Windows 10 as well):

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What if a wired device isn't installed properly?

Connected USB device is not detected in Windows

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How to back up and restore the registry in Windows:

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Download Software Canon Printer

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