Ask Computer Networking Questions and Get Answers ASAP
Have you reset your modem / router?
Do your mail apps work on that machine? go here and scan your PC for Malware:
OK you only said web pages were not connecting, you can transfer the Malwarebytes software to the other PC using a USB stick
You can also try adding these servers to your network connection properties under the DNS setting:
Let's plug it in by Ethernet and see if that works first..