I'm assuming you've tried rebooting your system? Could you try quitting all of your apps in your taskbar area (next to the clock), what's happening here is that something is using Flash player (besides the browser) and the installer is failing because it can't overwrite it.
Whe I run "install_flashplayer10_chrd_aih.exe" in my task administrator appears the proccess, after a few seconds appears a new one with the same name and then appears the alert that ArthurSkop sent. I think It isnt't a windows trouble, I think it's a installer bug.
Thanks, I'm going to forward this along to the installer team. In the meantime, please use the installers located in this FAQ post:
I met the same problem...
1. I download two exe files: "install_flashplayer11x32_mssd_aih.exe" and "install_flashplayer11x32ax_gtbd_aih.exe";
2. I execute "install_flashplayer11x32_mssd_aih.exe" with admin privilege and then it disappeared;
3. after 2, I execute "install_flashplayer11x32ax_gtbd_aih.exe" and the alter window of "Only a single instance of this application can run." popup;
is there something wrong?
Hey, I have been fighting this problem for over a week now. Just figured things out today. I had installed Microsoft Silverlight a bit ago. I think that is the "other instance" that the computer was trying to tell me was interfering with installing Adobe Flash. I think it is a version of Flash Player. I uninstalled it and then installed the 64 bit version of Adobe Flash for other browsers (other than Iinternet Explorer). The Flash player now works with Safari and Firefox. There was a suggestion to download Google Chrome since it has an integrated Flash player and I did that. It worked great from the start, but I still wanted to use my other browsers. There was a version of Flash Player just for Internet Explorer, but I did not install that since I am uncertain whether or not I am going to use Explorer going forward. It has been acting up. I really hopes this helps some of the rest of you.
Use the link in the post above to download the correct Flash Player.