Thank you for contacting Microsoft Customer Service.
I understand from your email that you want to move
Windows 8 Professional from once PC to another. I will be happy to help you.
Sabir, I would like to inform you that if you have purchased Windows 8 Professional under upgrade Offer, then whenever you reformat your system or reinstall on different PC you need to first install Windows XP, vista or Windows 7 then only you can upgrade to Windows 8 Professional and activate Windows 8 Professional.To download Windows 8 upgrade version please visit the below mentioned link.
http://windows.microsoft.com/en-IN/windows-8/upgrade-product-key-onlyIn order to activate Windows 8 Professional, you have to contact our Product Activation Team and they will activate your product over the phone. You can contact them at the below numbers:
Tel: 080-40103000Toll free: 1-800-11-1100(BSNL and MTNL)Toll free: 1-800-102-1100 (AIRTELI request you to please choose the IVR option 1 and 1-4 to reach the Product Activation Team.
I hope you find the above information helpful. If you have any other questions or queries, please feel free to reach us on below numbers.In case you have any general inquires about Microsoft Products and Service, you can submit a request by clicking on the link below and we would be happy to assist you with the same.
https://support.microsoft.com/contactus/emailcontact.aspx?scid=sw;en;1214&ws=india&ws=supportThank you for Choosing Microsoft Products and Services.*****Microsoft- Customer ServicesTel: 080-40103000Toll free: 1-800-11-1100(BSNL and MTNL)Toll free: 1-800-102-1100 (AIRTEL)Website:
http://www.microsoft.com/indiaWindows 8.1 is here
http://www.microsoftstore.com/store/msin/en_GB/homeNow Chatting with us is just a click away.... Microsoft Contact US Chat