Upgrade must be run with administrator rights

 This could be caused by User Account Control, a feature which makes so that, even if you have administrative rights, you don't actually have them unless you explicitly request them. There are two distinct policies governing UAC behaviour (both found in Computer settings\Windows settings\Security settings\Local policies\Security options), one for the built-in Administrator account, and another one for all other administrative users:

User Account Control: Admin Approval Mode for the built-in Administrator account (disabled by default) User Account Control: Run all administrators in Admin Approval Mode (enabled by default) What this means is: by default, the built-in Administrator account is not affected by UAC, while all other administrative users are; thus, it's possible for an administrative user (different from the built-it Administrator) to not actually have administrative rights, even if it's a member of the Administrators group.

More info -> https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/dd835564(v=ws.10)

whenever you open the command prompt, its better to "open run as administrator".
click on start, type cmd, and then right click on cmd.exe and "run as administrator"