Okay, finally!!! I have a wf-3720 printer and I couldn't get the firmware to install so that my printer would show in the dropdown box to activate.
In addition to what SuziniNC did above...
1) I made sure my antivirus software and firewall was temporarily disabled.
2) I combined the steps from the video and SuziniNC. When the program stalled, I unplugged the power cable, for a count of 10, and then plugged it back in again. Then once it was on again, and install was around 85%, I used task manager to end the InkChip task.
3) This was the kicker, and feels like a duh moment because most programs tell you to do this anyway when installing a new program - I restarted my computer 🤦🏽♀️.
4) After restarting, I disabled my antivirus and firewall again, just in case. Then started the activation tool. My printer now showed in the dropdown box where it should.
Now follow the rest of SuziniNC's steps to start Activation. I had to manually restart my printer, but it FINALLY worked😁