I have tried everything and nothing helps:
Deleted the Flashplayer program with several uninstaller programs. Deleted Skype and every other thinkable disturbing program. Nothing helps; Trying to install flashplayer again only results in the text: “Only a single instance of this application can run”!
Using Firefox and Windows.
Any idea anyone?
Download and run the uninstaller from
Download and run the installers
Here is the link to download flash player for Plugin based browsers.
Link to download Flash Player for Internet Explorer:
You can also try downloading Google Chrome, It has a inbuilt Flash Player.
I'm confused. You're screenshot states "Adobe Acrobat Installer', not 'Adobe Flash Player Installer'. If this is indeed Flash Player installer, please post the correct screenshot, otherwise, please post your question in the Acrobat forums.