Start right at the beginning. Put the Hub into its router mode, turn it off, disconnect everything from the 4 ports and do nothing for a few minutes.
Turn the Hub back on and wait for a few more minutes while it reinitialises and connects to the cable network. Be patient and wait as indicated.
Now turn the PC on wait for it to boot and get yourself logged in. Make sure you are setup for DHCP Ethernet and finally connect Ethernet from the PC to the Hub.
The Hub should allocate an IP in the 192.168.1.x range to the PC. You should now be able to browse the internet.
If windows will not connect then there is something configured wrongly on windows, as 192.168.1.x is a perfectly valid address range.
If you get this far successfully, then you have to consider what to do next. Maybe connect more Ethernet devices. Or first figure out how your netgear stuff works.
If the netgear system wants to be a router, you going to have to switch back to modem mode on the Hub. If you end up doing the latter, your own router must be the only thing connected to the Hub and must be configured for DHCP WAN address discovery. The Hub will move itself to a new address range, probably at address 192.168.100.1. If you can get connected to the Ethernet, the Hub should be visible at that address.