Posted 20 October 2010 - 08:26 AM
I was experiencing a similar issue not long ago.
Sometimes my Internet would work and sometimes it wouldn't. It always seemed like it was hanging up during domain name resolution. I tried flushing the cache and resetting the winsock (why does Windows need socks? ROFL). I changed my DNS provider to OpenDNS. NOTHING WORKED!!!
I was getting so frustrated until one day I was talking about it with one of my buddies at work and he said that the router I was using was known to cause problems. I hand't thought about it but the router I was using was rented from my ISP (couldn't afford one at the time).
This router was actually a modem/router (modem and router built together). Well apparently this caused a lot more interference than I thought it would.
When you have a device like a router with it's antennae wrapped around another device that passes off thousands of bytes of data every minute then you are bound to have problems.
Are you using a modem/router? If so, I'm willing to bet that the problem lies within your hardware.