Its a problem with permissions for updating your .PlayerNet App.
This message come from updater.exe
If you have any antiviruses, please add PlayerNet and updater to exceptions or disable antivirus for some minutes.
Make sure you started you .PlayerNet App with admin permissions - its necessary for Programme (x86) which you used.
When you see this message

our updater download to your .PlayerNet directory file: playernet.zip
Please check if it apear for you after you start .PlayerNet App.
As alternative method you can try to install .PlayerNet App in your user directory (for exmaple Desktop).
In any problems - let us know 