The problem is with a DNS patch MS issued Tuesday July 8th and ZoneAlarm firewall.
Unfortunately, even though the patches were developed to fix the problems, they managed to create others, as users of the popular ZoneAlarm firewall found themselves unable to access the Internet after applying the patch. Users reported their problems but so far there are no clear ways of dealing with the problem.
ZoneAlarm recommends for all users encountering this problem to uninstall the patch and wait for its bug to be handled.
My recommendation is NOT to install it if you are using ZoneAlarm
Start Internet Explorer go to MS updates and do the Custom update, when you find KB951748 uncheck it and tell it not to remind you again, at least till ZoneAlarm patches their product.
Some more info: http://support.microsoft.com/kb/951748
http://www.dslreports.com/forum/r20759839-MS-update-KB951748-and-ZoneAlarm-PROBLEM
http://www.efluxmedia.com/news_Microsoft_Patched_Up_Several_Serious_Security_Flaws_20115.html
