Why am I getting security certificate errors?

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I regularly get the error message, “Internet Explorer blocked this website from displaying content with security certificate errors.” This happens no matter which version of Internet Explorer I use (I have access to 8, 9 and 10 on various computers). The only common denominator that I’ve come up with is my router. I’m using OpenDNS to filter our internet access. Is it possible that OpenDNS is keeping the security certificates from working?

OpenDNS could be keeping the security certificates from working, but that’s not the first thing that I would look at in your scenario.

Does this happen on all of the https sites that you visit? Or just a few? Maybe even just one? It’s possible that there really is a certificate error on the server; perhaps something as simple as an expired certificate could cause this error message to appear. If so, that’s a server issue and not yours.

On the other hand, if you’re seeing this message at all https sites, then it could mean a couple of different things.

Read moreWhy am I getting security certificate errors?

Why is Microsoft Security Essentials constantly saying potentially unprotected?

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Quite some time ago, I installed Microsoft Security Essentials as per your recommendation. I liked it right off the bat, but lately after turning my computer on, a small icon appears in the lower right-hand corner of the tray, telling me “Potentially unprotected” and that my virus protection is turned off and that my computer may be at risk. This happens occasionally, but now it’s happening every time. When I go to Microsoft Security Essentials, I see that my real-time protection is on and virus and spyware definitions are up-to-date. To get rid of this icon, I have to manually do an update every time. Once this is done, the icon disappears. This never used to happen until about three months ago or so. Do I have a virus in my system or malware or spyware wanting me to use their protector?

I’ve seen it, too. It seems to be fairly common.

I’ve run into several theories about why this might happen.

Read moreWhy is Microsoft Security Essentials constantly saying potentially unprotected?