Cannot watch any videos whatsoever since updating Flash Player...

  Florio 05:59 07 May 2015

The other day I updated Adobe Flash Player, Java, and Adobe Reader; the installations went smoothly but the following day I discovered that I could no longer watch any videos at all. The Flash Player and/or Firefox always crashes if I try to watch online videos (inlcuding YouTube), whereas my media player (Media Player Classic) crashes when I try to watch my downloaded videos. I did a system restore, which initially ran into problems, but even after the restore the video issue persists. Can someone offer some assistance?

P.S. I had also updated my video driver (ATI Radeon) around the same time as updating the other software, as I kept getting messages telling me that it had stopped working. But I doubt that this is connected to the video problem.

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