Rightclick on the network icon in tray, select "status", then hit Properties button, select "Internet Protocol TCP/IP" and hit properties button.


Try setting both IP and DNS server adresses settings on "auto". You might need to disable/enable the connection.

Also, you can use laptop to access router. If it is D-Link, then enter 192.168.1.1 in the address bar in Internet explorer. From there you can navigate and see if your problematic machine is being sensed and assigned its IP address. Use that address to manually configure connection settings.

It should look something like this:

IP Address: 192.168.1.2 <-- your PC's address
Subnet Mask: 255.255.255.0
Default gateway: 192.168.1.1 <-- Router's Address

Proffered DNS Server: 195.29.149.196
Alternate DNS server: 195.29.149.197

You will also have to manually assign IP address to your PC on the router side. (192.186.1.2 in this case)

Manually assigning IP addresses speeds up the connection initialization, but is prone to connectivity problems.