DigiNotar is a digital certificate issuer that was attacked by hackers and proved to have forged certificates on a large scale. These forged certificates may cause users to suffer man-in-the-middle attacks or other security risks.
After installing the update of KB26 16676, Windows XP system will put the related DigiNotar root certificates into the untrusted certificate store, thus effectively revoking the trust of these certificates. This helps to prevent users from being threatened when they visit malicious websites that use these forged certificates.
Therefore, there is nothing wrong with not pretending;
You can go to the normal machine, see if there is one in the root certificate and one in the untrusted list, and you will know.