Doesn't have a valid IP configuration

NavyLCDR said:

But they should know how to configure the computer to work with the modem. Key word, should, depending on which person you get on the other end of the phone.

Yes agreed but I did study Computer Science for two years so I should also know how to solve it.

It all comes down to some settings in a router. What type of TP router do you have?
It would be probably best, to disable DHCP on your computer and set up IPv4 manually.
Reserve one IP in a router for you computer only and if possible, set DHCP lease to forever.

TairikuOkami said:

It all comes down to some settings in a router. What type of TP router do you have?
It would be probably best, to disable DHCP on your computer and set up IPv4 manually.
Reserve one IP in a router for you computer only and if possible, set DHCP lease to forever.

Um uh sorry for not being clear enough, the router is a Cisco EPC3825 and I mentioned that I had a network card in a pci slot that is from TP.

Well, you can not disable DHCP, but at least try assign a static IP to your computer in a router.
Look in the manual on the page 32, this should at least make your computer use the same IP.
Set a lease to 0, this should keep your connection up and running for a day, then, who knows.

http://setuprouter.com/router/cisco/...anual-1490.pdf

The problem free solution would be to disable DHCP on the router and set up IP manually on all devices.
But that would be somewhat uncomfortable. Do not forget to back up settings before changing anything.