Need Help After Download

App downloaded on laptop but getting error.
App is downloaded as per the instruction only.
Following is the error:
"MIT App inventor tools has been previously installed for all users. Please restart the installer with Admistrator Privileges".

Please do assist.

Why are you reinstalling the debugger component of AI2 if it is already there on your laptop?

What is the solution please do assist.

Is there any helpdesk or number to contact

How to install not getting please help