I recently upgraded to windows 10 from windows 7 and spent the last two days pulling my hair out and cursing microsoft because nothing I tried would restore my internet connectivity. I knew that I could connect because I could hit my gmail and google search while in chrome only, but nothing else worked. I tried removing AVG, disabled my firewall, re-enabled my LAN and wireless, etc., etc.

I finally figured that it was something that was blocking my internet access to certain sites, but it wasn't a firewall and I don't have BitDefender, so what could it be? Aha! I remember that I had installed a web filter to keep out the porn sites called Net Nanny. Deleted that sucker and poof, I was back in business. Not sure if Net Nanny is even compatible with Windows 10, but I don't think I'll be trying to re install it.