Please don't do that.
See request for clarification here (your second post): http://forums.cnet.com/7723-6122_102-567798/adobe-flash-won-t-install/?tag=contentBody;threadListing
Running two separate threads at the same time can get very confusing, and as the info is different in each post, different users/moderators will respond with different ideas and solutions.
I was having trouble seeing the web players for watching videos online, so I checked to see if my extensions needed updating, and flash player needed an update, so I clicked on the "download update" link (using Firefox). The download completes just fine, but when I click on the icon, it starts like it's going to install, and the icon just disappears, and nothing happens. The installer process is running, but it does not install. Any ideas as to why?
Thanks in advance.