2 Replies Latest reply: Mar 10, 2012 12:16 AM by ScreenWonderer100 RSS

    Can't Install Flash Player, What does "Only a single instance of this application can run" mean?

    ScreenWonderer100

      I try to follow the steps 1-3, as it shows. After it downloads, after step 2, a dialog box pops up saying “Open Executable File? Then it says it may contain viruses or malicious code and to be careful when opening file.  So I click OK, then step 3 occurs, file name lists as: install_flashplayer11x32_mssd_aih(2).exe.  So then I hit “Run”.  Then another dialog box pops up titling “UI_FlashPlayerInstaller”, and it says “Only a single instance of this application can run”, “OK”. I’ve checked to see if there is another version installed, but I don’t see any.  I am operating a Windows 32 Bit, FireFox,