MS root cert docs indicate they switched at vista from manual/auto downloadable updates to some form of OS online on the fly only auto update system. Where link at microsoft can one still download a file containing their entire current root cert bundle in some parseable format?
It has to be somewhere near here but I'm dense today... http://social.technet.microsoft.com/wiki/contents/articles/3281.introduction-to-the-microsoft-root-certificate-program.aspx ex: mozilla is here https://hg.mozilla.org/mozilla-central/raw-file/tip/security/nss/lib/ckfw/builtins/certdata.txt
