When online making a purchase, no matter what site, I get the following message when trying to complete or "checkout" the transaction......

IDENTITY CERTIFICATE CAUSING AN UNKNOWN SIGNATURE ALGORITHM

I have perused all the security settings and tweaks I can find in IE 5.0 and come up empty. I had a similar problem before once, and a re-install was all that fixed the problem. Never did know what it was.

Something has happened as this trouble used to not occur on this particular pc. Any help or ideas would be greatly appreciated!