I've found several posts on this subject, but the thread was closed to comment. I tried the dll installs that were meticulously typed into the posts, but it did not fix the problem. (I had an error in one of them, so perhaps it was this that prevented access to secure websites-- email, etc.) soooooooo.............. I reinstalled Windows SP3 updates and it fixed the problem. I've found it useful to have a saved copy of SP1, SP2, SP3 on a memory stick if ever I need to reinstall XP or if files become corrupted.