Error code -1


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  • . Technical problems / Error messages

This error may occur when downloading a codec or activating a program.
Normally, the first thing you should do to resolve this issue is reset Internet Explorer to its default settings.

You can also do the following:

  • Open the Windows Control Panel and go to "Internet Options" > "Advanced" (if you do not see "Internet Options", change "View by" to "Small icons" in the upper right-hand corner).
  • Check to make sure all the entries from TLS 1.0 through TLS 1.2 are checked off in the list. If they are not, check them off and click "Apply".
  • In the Control Panel, go to "Administrative Tools". 
  • Open "Services" and locate the service called "Background Intelligent Transfer Service". 
  • Right-click it and select "Properties" in the context menu.
  • Check to make sure "Startup type" is set to "Automatic".

Try downloading the codec or activating the program again.
If prompted, tell your firewall or antivirus program to allow the connection.
If you still experience problems after this, check to see whether Internet Explorer is in offline mode.

  • To do this, go to "File" and check to see if the "Work Offline" option is enabled. If it is, disable it.
  • Go to "Extras" in the menu bar and select "Internet Options".
  • Go to the "Advanced" tab.
  • Under "Security", look for an entry called "Warn if changing between secure and not secure mode" and remove the check mark.