If your computer is slower now than it was before you installed SP 2 or if you are experiencing any other anomalies adversely affecting your computer's operation as a result of the installation of SP 2 or any other Microsoft Critical Security Update please see below:
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