One computer on network doesn't connect to inteet

We have a small home network with 2 PCs and an assortment of mobile devices.

Recently, the newer of the PCs froze and needed a restart. However, since the reboot, it won't connect to the inteet. Mousing over the networking icon on the start bar yields the text "Unidentified Network. No inteet access".

We have tried numerous things. We have restarted the PC and the router numerous times. I have disabled and re-enabled the static IP multiple times and it doesn't work in either case.

Looking at the network info, it says "No Inteet Connectivity" next to both IPv4 and IPv6.

The computer is connected via a 3m etheet cable going through the floor.

Running ipconfig /all gives the following information:
Windows IP Configuration
IP Routing Enabled : No
WINS Proxy Enabled : No
Etheet adapter Router
DHCP Enabled : Yes
Autoconfiguration Enabled : Yes
Autoconfiguration IPv4 Address : 169.254.52.90(Tentative)

The last line I copied is what I am most suspicious of as surely it should be along the lines of 192.168.0.X

What should I do? And what part is failing?

If any further info is needed, do ask.

It's also worth noting I am not particularly experienced with networking setup but I can understand most of it.

Thanks for any help.

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