I am having the exact same issue. However, I only have Macs available and no PCs. I tried using different computers, cables, USB ports and also tried the new Line6 Central app. The update in DFU mode always fails after a few seconds and POD Go is stuck at "Updating...".
I even installed a Windows VM, but Line6 Updater does not recognize POD Go in the virtual machine, though it is connected to the VM and shows up in device manager.