These permission problems are sometimes very difficult to diagnose. Try if the MSI installer works better; it often did in the past.
Internet Explorer: download.macromedia.com/get/flashplayer/current/licensing/win/install_flash_player_13_act ive_x.msi
Other browsers: download.macromedia.com/get/flashplayer/current/licensing/win/install_flash_player_13_plu gin.msi
I was unable to use the links you forwarded to me. I was able to install 11.7 and it works for now. I tried to install 13 again but will not install, same problems as previous email. Used uninstall and reinstalled 11.7. Would like to get 13 working.