Imac PowerG4 with no Air Port unable to connect to internet via LAN
Hi
I have an old iMac PowerG4 working on Mac OS X 10.3.9. It does not have an Air Port. I have connected a LAN cable to it in hope of reaching the web. This used to work via a dial up modem. If I go to network settings it does see the LAN connection but nothing comes up over the browser. I bought a USB wifi adapter but cannot run the setup for the adapter. I used a usb key to import the driver but it tells me it cannot open it since it cannot confirm the certificate. Same goes if i want to update safari via the usb key.
Before anyone tells me to check the LAN cable, I have tried 3 which all work with something connected to them.
Any help would be appreciated otherwise its going to the recycling plant.
cheers
iMac (M1, 2021)