Cannot install, gray application does nothing

[sw53826168]

Hello I am trying to update to Flash Version 18.0.0.194 as Firefox 39.0 is nagging me to do so.  When I download the installer and click it, a gray application appears but there are no buttons and no text on it.  It says Adobe Download Manager in the blue top border, and the rest is a gray gradient.  The only thing possible to do is to use the X at top right to exit or _ to minimize.  Exiting causes the installer file to delete itself. 

I am on Win 7 64-bit on a Dell desktop.  I have tried rebooting and exiting Firefox.  I have tried moving the installer files to different directories.  I wonder if someone can help.  Thanks.

[Carm01 · Accepted solution]

Grab the Uninstaller here:

http://download.macromedia.com/get/flashplayer/current/support/uninstall_flash_player.exe

Run it; it will uninstall ALL flash player versions!

Next try installing the files at the bottom of this page one by one; these are the offline installers

Installation problems | Flash Player | Windows

If that does not work, then try this here:

Can't install updates

[sw53826168]

Thank you, the bottom of the page file works.

[benh76973286]

Oh look, an arbitrary workaround for tech problems. I wonder when we'll stop needing these. Hopefully before flying cars and colonies on the moon. Or maybe we should just shoot all software developers to the moon until such a time arrives.

[sw53826168]

So it seems Flash needs to be updated again, but I still can't see the buttons on the latest installer.  Do you have any idea what is wrong with my computer?  I assume most people can see the buttons (I can see them on another computer) but they cannot be seen here.  I have run my anti-virus as a precaution.  Thanks.