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Browsers unable to connect to (almost) any website

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On Thursday morning when I started my computer I got the following error message.

C:\Program Files\Zone Labs\ZoneAlarm\zlclient.ext
Validation failed for C:\WINDOWS\system 32\VSINIT.dll. You are probably missing a necessary root certificate.

The first thing I did was try a system restore, but that did not change anything.

I went to Zone Alarm site and found that this is their top question.

They say:

ZoneAlarm 6.5 or below can no longer function.

Un-install your version of ZoneAlarm and if you have a valid genuine ZoneAlarm license key in good standing you will need to upgrade and download version 8.0.400.020

I tried to uninstall in the normal way using Revo Uninstaller, but the uninstall failed.

Zone Alarm's site gave detailed instructions of how to uninstall the program in safe mode, which I followed except for manually removing the registry entries as I was not confident about doing that. I then ran Revo and deleted the registry entries from there.

As far as I can tell, there is nothing left of Zone Alarm on my computer and I am not now getting the error message.

I have tried several programs, Photoshop, Painter, Corel Draw etc, and a few games and everything seems to be working normally.

Yesterday, before doing the uninstall I was able to access my usual websites for a few minutes, then both Firefox and Chrome stopped responding. Since uninstalling Zone Alarm I cannot access any websites except my online banking account (Barclays Bank) and the Control Panel for our website hosted by One.com. I am unable to get to any other site at all.

The router is connected by wire to my computer and to my husband's. His is working fine and so is the laptop which I am using now, so there is nothing wrong with the connection. On my desktop computer I am still able to send and receive email through Thunderbird and also upload to both our business website and my personal one.

I don't know what to try next and was hoping you could advise. My only ideas were to install an up to date version of Zone Alarm, and of Chrome and Firefox. Do you think that would help or is there another simple answer?

I have run AVG twice and it has not found any virus, but it is not able to update today because of the connection problem. I do not have any P2P programs installed.

I would be grateful for any suggestions.

Thank you.
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Fixed it! Don't know how but I am making this post in case it helps someone else in the future.

I installed the updated version of Zone Alarm but was still only able to connect for five or six minutes.

This morning I tried to uninstall ZA with Revo Uninstaller, and part of it would not uninstall. I let Revo remove everything it could, including the registry entries and then followed the uninstallation instructions on Zone Alarm's site and deleted everything again in safe mode.

It seems that the old version of Zone Alarm caused the problem in the first place, but installing and removing the new version seems somehow to have fixed it.
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