If you are having trouble watching online videos like on YouTube it can be fixed by following these instructions:
The fact of the matter is that you do not have the appropriate version of Flash Player installed. You can get it
here, it is free.
This will open the Flash Player web site containing the latest Flash Player.
Make sure you uncheck the box next to
Include in your download if you do not wish to have a Google toolbar installed as well. Then all you have to do is click
Download now.
The following page will open:
Right click on the security bar below your tabs and select
Install This Add-on for All Users on This Computer...After that an
Internet Explorer - Security Warning window will be displayed, click
Install.
Flash Player will now begin installing, let it complete.
Once installed, you may need to reboot your PC (I recommend that you do).
Now you should be able to watch YouTube videos in your web browser like normal. Every now and then check to see if a new version of flash player is available on their website.