Microsoft Support numbers

1-866-PCSAFETY (727-2338)  MS Product Support Services – No charge for support associated with security updates.

Microsoft Business Critical Support
North America
Contact Information
  
Canada (English)
1-800-426-9400 or 1-800-426-9400
  
Canada (French)
1-877-453-1317 or 1-800-426-9400
  
United States
1-888-455-7422 or 1-800-426-9400
  
Availability
This benefit is available 24 hours a day, 7 days a week to all Microsoft partners in the United States and Canada.