|I have an IBM NetVista which I bought second hand.|
The internal NIC didn't connect when I first bought it,
so naturally I tried a secondary PCI NIC. That didn't
fix the problem.
I double-checked to make sure the drivers were
correct and they were. I tried connecting through a
router and directly connecting to the modem.
So I took the PC to a friend's house. He had the same
ISP and I used the same cables and it connected
without a problem.
I worked IT for 3 years and this is by far the
weirdest/most frustrating problem I've encountered.
I've used the built-in diagnostic tools and command
line steps recommended by Microsoft Document
314067. No success.