Ever since installing a new graphics card and PSU into my PC a couple of weeks ago I have been unable to connect to the internet?! It seems odd to me that this issue has occured around this time, but I don't know how related it is.
My PC is using a USB wireless network adapter to connect to the network, and will connect to the modem but then not through to the internet. I am using the same router etc. for the internet connection from my laptop and this is working fine. I even tried to hook my PC upto mobile internet using a friend's 3 internet-anywhere dongle and even through this we could receive no internet.
My ISP on the phone told me to uninstall and reinstall my drivers of my network adapter, but to no avail. When trying to reinstall the drivers the installation gets stuck on "Insert your network adapter now" screen, although the computer can recognise that I have plugged it in (Windows tries to install drivers).
I can see from your IPCONFIG dump that you have DHCP enabled, but it’s ultimately configured w/ a 169.254.x.x IP address. That means it’s not getting a response from your DHCP server for some reason. What you need to do is determine if it’s ONLY a problem w/ DHCP, or something deeper and DHCP is just a victim.
Try configuring your PC's TCP/IP configuration manually (i.e., without DHCP). For example, if your router's IP address is 192.168.1.1, then:
IP Address: 192.168.1.199
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.1
Preferred DNS Server: 126.96.36.199
Alternate DNS Server: 188.8.131.52