This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Have installed adobe flash player and is in downloads, and my documents, but I can't open it due to conflicting instance. No idea what to do next

more options

Trying to open adobe flash player so my daughter can play educational games. Think it's downloaded ok, but it won't open due to 'conflicting instances'. I don't even know what that means!

Trying to open adobe flash player so my daughter can play educational games. Think it's downloaded ok, but it won't open due to 'conflicting instances'. I don't even know what that means!

All Replies (1)

more options

This is the full procedure for installing Adobe Flash for Firefox.

1.Download the Flash setup file from here:
Adobe Flash - Plugin version.
Save it to your Desktop.

2. Close Firefox using File > Exit
then check the Task Manager > Processes tab to make sure firefox.exe is closed,
{XP: Ctrl+Alt+Del, Vista: Shift+Ctrl+ESC = Processes tab}

3. Then run the Flash setup file from your Desktop.

  • On Vista and Windows 7 you may need to run the plugin installer as Administrator by starting the installer via the right-click context menu if you do not get an UAC prompt to ask for permission to continue (i.e nothing seems to happen).

See this:
http://vistasupport.mvps.org/run_as_administrator.htm