Following an automatic Windows update last week this Windows 7 computer no longer can access Internet. The NIC interface works fine and the PC has full access to the LAN and the servers and devices on the LAN. This has the look of a corrupt Winsock but my efforts to fix it so far have been unsuccessful.
Here's some details...
*All other PCs on the network access Internet successfully
*problem PC can ping network and network can ping PC.
*problem PC can reach mapped shares on the network.
from PC fails although the ping reports the correct IP address for the targets suggesting DNS is resolving
*have run Microsoft repair wizards for Internet and for Network Connection. They report Network Connection good but Internet Access fails. They do not fix the problem.
*Malwarebytes full scan reports NO infections
*Kaspersky root-kit scan reports NO infections
*The Windows update I believe caused this was ... KB2607712
*have run several NETSH commands which supposedly fix Winsock errors, such as ...
netsh int ip reset
... but no success.
*I have tried System Restores going back one week and two weeks. However after the System Restores I could not log into the domain, getting "The trust relationship between this workstation and primary domain failed." I then had to crack the local administrator password, log in as same, and return PC to current System Restore to fix the domain login.
At this point I can't think of anything but WINSOCK ERROR causing this problem but I can't get anywhere fixing that. Before I wipe the drive and reinstall this users' complete system ... Any help? Thanks!