Those of us who downloaded and installed today's Microsoft's update KB951748 (and are running ZoneAlarm) have found that this update makes ZoneAlarm block any access to the internet.
There are two fixes:
To get you back onto the net you can alter the ZoneAlarm settings. Open ZoneAlarm, go to Firewall, Main and reduce the Internet Zone Security to Medium. That will get you online.
A proper fix until Microsoft pull their collective finger out is as follows: Open 'Add or Remove Programs' in the Control Panel. Remember to check the box marked 'Show Updates'. Then scroll down the list until you see the MS Update KB951748.
Remove this and you can re-set your Internet Zone Security setting to maximum.
Then change your Microsoft Security update settings to 'Notify Before Update'. You should have it set to this as default anyway considering the problems that have been associated with MS updates. If in doubt do a Google search before downloading and installing any MS updates.
You'll probably get another prompt from Microsoft asking you to re-install KB951748 but don't do it.
MS are apparently on the case but until a better security update is available beware!
