Step by Step upgrading win 7 to 8.1 or 10 with error handling through SCCM2012R2

In this document, you will see how to upgrade your client OS from Windows 7 to Windows 8.1 or 10. Same procedure for the windows 10 and 8.1. In this document you will find the resolution for the issue that often comes during upgrading the Client OS. Things you should know before 

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Verified on the following platforms
Windows 10 Yes
Windows Server 2012 Yes
Windows Server 2012 R2 Yes
Windows Server 2008 R2 No
Windows Server 2008 No
Windows Server 2003 No
Windows Server 2016 Yes
Windows 8 Yes
Windows 7 Yes
Windows Vista No
Windows XP No
Windows 2000 No
This script is tested on these platforms by the author. It is likely to work on other platforms as well. If you try it and find that it works on another platform, please add a note to the script discussion to let others know.