Microsoft Security Product Support Policy
Technical support is available from Microsoft Product Support
Services at 1-866-PC SAFETY (1-866-727-2338). There is no charge for support calls associated with security updates.
International customers can get support from their local Microsoft
subsidiaries. Phone numbers for international support can be found
Microsoft Security Bulletin - Summary for August, 2006http://www.net-security.org/advisory.php?id=6606
Being that you are having a problem with authentication and if you reach the thirtieth day without getting that straightened out and you are having problems as a result of the re-installation of SP2 as well, I suggest you call the number above or take advantage of the email method of contacting Microsoft Support from the Microsoft or Windows Update pages IMMEDIATELY!