Is that the only problem the computer is exhibiting or are there other problems as well?
You may have drivers that are not supported in SP2 that need to be updated.
Go to your control panel and update any drivers whose devices show a yellow or red warning icon.
If the problem continues:
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
You can also access Microsoft Help And Support by going to Windows Updates (or Microsoft Update - whichever default applies) and clicking on "Help and Support" on the left side of the page.