1. Go to Tools\internet options\connections\settings and make sure "use a proxy server for this connection" is unticked
Also check the LAN settings and make sure that is not ticked either
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Go to Start > Run and type in "command" then "ping 64.58.76.176" with out the quotes and hit Enter on the keyboard.
You should get something like the following:
C:\WINDOWS\Desktop>ping 64.58.76.176
Pinging 64.58.76.176 with 32 bytes of data:
Reply from 64.58.76.176: bytes=32 time=55ms TTL=238
Reply from 64.58.76.176: bytes=32 time=55ms TTL=238
Reply from 64.58.76.176: bytes=32 time=55ms TTL=238
Reply from 64.58.76.176: bytes=32 time=54ms TTL=238
Ping statistics for 64.58.76.176:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 54ms, Maximum = 55ms, Average = 54ms
C:\WINDOWS\Desktop>
If you get ping statistics Sent = 4, Received = 4, Lost = 0 (0% loss), try this:
Go to Start > Run and type in "ping yahoo.com" with out the quotes and hit Enter on the keyboard.
You should get something like the following:
C:\WINDOWS\Desktop>ping yahoo.com
Pinging yahoo.com [64.58.79.230] with 32 bytes of data:
Reply from 64.58.79.230: bytes=32 time=55ms TTL=238
Reply from 64.58.79.230: bytes=32 time=55ms TTL=238
Reply from 64.58.79.230: bytes=32 time=55ms TTL=238
Reply from 64.58.79.230: bytes=32 time=55ms TTL=238
Ping statistics for 64.58.79.230:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 55ms, Maximum = 55ms, Average = 55ms
C:\WINDOWS\Desktop>
If you can ping an IP address and not a FQDN, such as yahoo.com, it's dns related and possible a corrupt winsock2 key in the registry, or third party software.
If you can ping both, it's the browser as the operating system is working both ways.