Parallels Panel pre-upgrade checking has reported the problems. How to solve?

[CharnchonL]

Trying to upgrade from 11.0.9 to 11.5.30 online, we have encountered this error at .../examine.html. How do we solve them?

Parallels Panel pre-upgrade checking...
'systeminfo' is not recognized as an internal or external command,

operable program or batch file.

'REG' is not recognized as an internal or external command,

operable program or batch file.

'REG' is not recognized as an internal or external command,

operable program or batch file.

'REG' is not recognized as an internal or external command,

operable program or batch file.

'REG' is not recognized as an internal or external command,

operable program or batch file.

'REG' is not recognized as an internal or external command,

operable program or batch file.

'hostname' is not recognized as an internal or external command,

operable program or batch file.

FATAL_ERROR: Command: hostname returns:
Hostname is not defined and configured. Unable to get hostname. Server should have properly configured hostname and it should be resolved locally.

 

[CharnchonL]

error attached

 

[IgorG]

What is the problem with this explanation and solution:

Hostname is not defined and configured. Unable to get hostname. Server should have properly configured hostname and it should be resolved locally.

?

Fix for

'REG' is not recognized as an internal or external command,

can be easily googled...

 

[CharnchonL]

Hostname is actually defined but Plesk said it wasn't defined. That's the problem.

Sorry I didn't find the solution when I googled. Maybe I was looking for the error specifically for Plesk Windows. Can you lighten me the path?

 

[CharnchonL]

nevermind
I have followed the instruction here to solve the problem
http://helpdeskgeek.com/how-to/fix-not-recognized-as-an-internal-or-external-command/

Just mentioned it here in case other people are experiencing the same problem.

I have added ;C:\Windows\System32 to the end of the "Path"