Genellay this is not a good thing to do! But sometimes when you work in development environments you need to do this to keep the Certificate Error warning from coming up. In my case it was needed because the logout is actually a logout on several levels using HTTP-redirects to travell between them. This was made impossible by the Certificate Error warning page.
To turn the warning off, change the followin registry key to 0.
HKEY_USERS\<SID>\Software\Microsoft\Windows\CurrentVersion\Internet Settings:WarnonBadCertRecving
Don’t forget to turn it back to 1 after testing though! Otherwise you are a bit unprotected.
Jan-Erik Öhman's Weblog 
i need help. thats certificate errors out of my computer. i m having a lot of problems because that.
Ok, I tried this but all the values are already set to 0. I still keep getting that damned little box, right smack in the middle of each page. What if I just delete the reference to this in the registry?
I haven’t tried it so I can’t say if it works or causes any troubles. Don’t forget to save the key first though (export) so you can restore it if your browser misbehaves.
ive tried everything to get ride of it its made my pc slow and it doesnt allow me to upload youtube videos from movie make anymore
Wonderful, thanks.
OMG you wont believe this, for a day I have tried to figure out why I was getting certificate warrning , thinking maybe it was a trojan,worm etc. my totally computer illerate wife called cox cable and told the guy what was happening he told her to check the computer date on the lower right hand corner and to our suprise it some how changed to 2007 and that was the problem, the year and date were WRONG, Bryan
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Bryan!!! I love you man! You just solved my problem!!! Changing the date WORKED!!!
I love you too. I been trying to fix this for six hours. This was my problem
too. Thanks for posting it.
Hello there! I could have sworn I’ve been to this blog before but after reading through some of the post I realized it’s new to me.
Anyways, I’m definitely happy I found it and I’ll be bookmarking and checking back often!
by following way u can do this
go to TOOLS>INTERNET OPTION>ADVANCED
and untick the check for publisher’s certificate revocation
untick the check for server certificate revocation
untick the warn about certificate address mismatch
Thanks for given..
Please Help to solve the same problem in mozilla & chrome browser using registry editing