A bit late to the party, but I wanted to add my 2c here. This one has taken me several hours to work out.
In my case the issue was on an HP ProBook 4530s running Window 7 Professional (64-bit). All Windows and HP driver updates installed.
Despite being connected to the Internet (whether via Ethernet or WiFi) I couldn't browse webpages. Booting into Safe Mode with Networking, I could browse the Internet just fine.
Also when connected via Ethernet or WiFi, the nonpaged RAM usage would climb to over 6GB of the 8GB total available RAM. Eventually the laptop would become slow and non-responsive with various memory errors, inability to shutdown or reboot.
I tried various steps including driver updates for the network adapters, uninstalling and reinstalling, flushdns, winsock resets as recommended elsewhere. None of which worked in my case. I also ran Malwarebytes and AdwCleaner in case some malware or browsed hijackers snuck onto the system, but nothing was picked up.
I had in-mind that ESET Smart Security (AntiVirus and Firewall) could have been getting in the way, and it had been updated to the latest version recently which reinforced that theory. I went ahead and uninstalled ESET SmartSecurity, rebooted, downloaded and reinstalled the latest version (10.1.219.0 as I type) then rebooted to finish.
Browsers are happy again and no ramping up of nonpages RAM usage, so I think that we're good to go.
HTH someone out there save a little time.
Cheers,
SnaxNZ