Learn how to Install Windows 10 on Vultr VPS – Step by Step Video.
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This video shows how to install Windows 10 on Vultr VPS.
ISO for Windows 10: http://22.214.171.124/iso/Win10Pro.iso
To install any other OS like windows 7 or windows server 2016 you just need the ISO and rest of the procedure is same.
If you have any problem please ask in the comments section and I will be happy to help you.