Install Error - Application tried to modify a protected Windows registry key

[Anonymous]

Good Afternoon,

      I seem to be having a problem getting AutoCad LT 2018 to install.  It gets on step 4/8 and then fails, when I check Event Viewer I see multiple MsiInstaller Errors with the following error description.

-->  The application tried to modify a protected Windows registry key.

Any ideas what might be causing this?

Thanks,

Ryan

[pendean · Accepted solution]

You forget to turn off your anti-virus and firewall during the software install?
or forget to log-in as a Windows Admin first?

[Mark.Lancaster]

@Anonymous

It sounds like you don't have the proper permission or like @pendean run your installation as the admin.  Also, without your installation log file we can only speculate what the issue is.  Post your installation log file.

Posting info: Sometimes the installation log file contains the serial # that was assigned to you.  Open your log file using Windows Notepad and perform a search on "/SN".  Depending on the number of installation attempts, your serial # may be located throughout the log file.  If present, remove or "X" out your serial # prior to posting.