SteveWh - 8:13 am on May 14, 2012 (gmt 0)

In Windows, a system restart completely clears the local DNS cache for a fresh start.

If CloudFlare didn't return a response for your site, I think that might be able to cause an issue that could last a little while, but a restart should have fixed it.

Maybe try accessing your site by its IP address instead of its name, avoiding DNS lookup: hxxp://nnn.nnn.nnn.nnn/ .