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Call (800) 426-9400 Monday through Friday, 6:00 AM to 5:30 PM Pacific Standard Time, or find an authorized reseller.
Call the Microsoft Resource Centre at (877) 568-2495
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Find the Microsoft Volume Licensing Website for your country/region.
Review frequently asked questions about Microsoft product licensing.
Visit the help and Support Web site to find answers to your product questions.
Contact a support professional by phone or e-mail for help if you purchased the product separately.
Contact your computer manufacturer for support if your product was pre-installed on your computer.
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