Why is computer not accepting certificates?

This is my situation. This started about a month ago. One of our customers computer isn't accepting all certificates. In IE, for example, when you go to a banking site it always declines (with the certificate warning) But when you discard it and go anyways, it does go but when you close IE and re-do it, the certificate error ALWAYS pops up. Exact same thing happens in Firefox. Even after I installed and stored the certificate, and closed and opened it, it still happens. Also note I have LogMeIn installed on it and it is now always viewing it as offline when I want to remotely connect. So I upgrade to IE8 and uninstalled/reinstalled Firefox fresh, and nothing has changed. The only firewall/antivirus installed is the basic Norton Anti-Virus 2009. (He's had that installed even before this all started) I DID notice that when I tried to go to the banking site it would flash the certificate error then immediately go to www.freeze.com. Thinking that its infected, I uninstalled all freeze apps. from comp. reloaded everything, restarted and still nothing but it doesnt go to that freeze thing anymore. Heres the kicker, I don't know if this makes any difference but coincidently about a month ago (almost exact) he had his RR internet service upgraded to Road Runner Turbo (previously had the basic speed) Just throwing it out there. As we speak Im doing some more scans for viruses just in case. Any IDEAS!?!?!?!?!
bLampertAsked:
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bLampertConnect With a Mentor Author Commented:
Figured it out! Each certificate wasn't getting accepted because each one was viewed as expired. I finally checked the date and the year was wrong. I never caught it before because the time was always right and the year was wrong! after i set it right, everything worked. Thanks for all the offered help!
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PcobiwanCommented:
Road Runner may have their own security that is interfering - I'd talk to their support.  

I'd also suggest looking at the Windows Firewall settings.

Also, I've had problems with freeze.com putting spyware on users PCs.  Try downloading and running Malwarebytes (www.malwarebytes.org).  It's free unless you want it to stay resident.  We've noticed that spyware designed to get around Norton/Symantec products is usually caught by MBAM.
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bLampertAuthor Commented:
I am going to call RR and ask. I did check the Windows firewall settings and everything seemed fine. Already have Malwarebytes installed and did a scan about a week ago - showed up nothing. Just doing another one just in case.

This issue is driving me nuts!
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bLampertAuthor Commented:
Update: Just got off phone with RR and they don't have security setup on his high speed connection. And Virus scan came back clean. So what could it be!!! (My last resort is a rebuild)
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PcobiwanCommented:
Did you recently upgrade IE and or Firefox?  Did you check the Windows Firewall and Norton 2009 Firewall settings?  What about the Phishing filter in IE - is it disabled in both security and advanced tabs?
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bLampertAuthor Commented:
I only upgraded IE to 8 thinking it was the browser. When issues started, no nothing new was installed/upgraded. Checked all windows firewall settings and had Norton Disabled the whole time. Reset IE settings and everything.
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PcobiwanCommented:
That's wild.  Have you enabled the security for 'Don't prompt for certificate when no certificate or only one certificate is available?'  If that doesn't do it then I'm with you I'd rebuild.  
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bLampertAuthor Commented:
I did enable it : /

someone, anyone helllppppppppppppp!
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PcobiwanCommented:
Does the new modem from RR have a firewall?  I know my modem does.  Sorry - just trying to brainstorm with you at this point.
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bLampertAuthor Commented:
He didn't get a new Modem, they just changed his service while on the phone
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