When the camera is connected via USB, the EOS Utility launcher should startup, detect what type of camera you have, and then launch either EOS Utility 2, or EOS Utility 3. Be sure to turn on the camera power switch after you connect via USB.
In some cases, the EOS Utility will try to launch the Wi-Fi utility and stop. Is this what you are seeing?
I suggest calling Canon Support at 1-800-OK-CANON.
However, I have experienced the same issue with cameras with built-in Wi-Fi. The Utility Launcher wants to default to the Wi-Fi utility, instead of the conventional USB connection. Try going into the Windows Start menu....look for the "Canon Utilities" folder, and manually launch the EOS3 utility. You will see more than one of them, but only one will launch the USB version.. Once a connection is established, the Utility Launcher should recognize your camera, and launch the prevously used utility....via USB.
WiFi pairing is initiated on the camera LCD menu, you need to choose EOS Utility as the type of connection, then follow the steps on the camera menu to configure the network settings. Near the end of the process the camera prompts you to start the pairing software on your computer, this is your cue to run EOS Utility.
With the release of EOS Utility 3.0 Canon has changed the process for WiFi pairing your EOS camera with your computer. Canon has added an EOS Utility Launcher that will start if you try to run EOS Utility when no cameras are connected to the computer with USB. The software assumes that no connected cameras means that you will connect a camera with WiFi.
If you disable wifi and reconnect the USB you should be fine.
After several months of spending what time I could spend googling and searching through all of the complaints and explanations that I could find as to why EOS Utilities would not recognize my T6i, and using trial and error on my own ideas of why, I finally figured it out. You have to do things in a specific order to keep connection long enough to get your camera connected to the EOS Utilities long enough to connect the camera to other devices. A few weeks or so after buying the camera, I made the mistake, while I was away from home with my camera and getting in a hurry to post pictures, of connecting my camera to my cell phone and loaded pictures onto Facebook. I had not had much time for doing much else previously with the camera but taking pictures and connecting it to the computer and downloading the pictures and videos to a flash drive via the computer and then sharing from my computer. After connecting my camera to the cell phone, the next time I got ready to download my pictures to a flash drive via the computer, the Cannon Utilities would not recognize my camera any longer. After messing with it for a while, I wandered if my connecting the camera to the phone had something to do with it and I kept googling how to fix the situation. But, nothing that I found solved the situation. After several weeks of searching for the answer during my spare time, I finally went to the reset the camera connection by enabling the Wi-fi/NFC and then going to Wi-Fi function and choosing the camera icon. I then I chose GENERAL SETTING and then I chose CLEAR WIFI SETTINGS and I set my camera back to default. I then turned off the camera, the computer, the Wi-Fi, and the internet for a while to make sure all connections were thoroughly disconnected. I then logged the internet, Wi-Fi, and then computer back on again. I connected my camera to the computer with the interface cable. I turned the camera on and click on the EOS Utility icon on my desktop which brought it up. It had choice that said something to the effect of connect by LAN or CLOSE and I clicked on the connect by LAN, or whatever that connect t choice stated. I then clicked on the start menu on my computer and chose EOS WEB SERVICE REGISTRATION TOOL. I followed the instructions that I had found on the canon web sites that I had googled on how to register your camera to Canon Image Gateway, Facebook and such. I made sure that the Nickname I gave for my camera was the same as the one I had given previously for the cell phone nickname connection. I register for the Gateway, Facebook and such and then transferred to the connections to the camera side of the form as per the instructions. Then after completing that task, I disconnected from the function and went to the room where my Wi-Fi station was connect to my internet and went into the menu on my camera and went back into the Wi-Fi connections on my camera screen. I chose the globe setting for connecting to the Wi-Fi and followed the instructions to select the WPS and connect using the WPS button on my Netgar Wi-Fi for each of the Gateway and Facebook. After getting all of that set up, I disconnect and started all over again connecting my cell phone to the camera again while making sure the camera nick names were the same.