Cannot use Flash player after 10.2, have to keep reverting back to that version or earlier.

I am frustrated.  I cannot use any flash versions later than Adobe® Flash® Player Installer/Uninstaller 10.2 r159 .   If I update to version 11 or later I cannot watch any flash videos.   The audio will play but the video freezes and pauses.

I have been trying to find a solution to this issue, versions 10.2 and earlier work fine but ever since the new flash was released and I have tried to update, I run into the same problem and have to revert back to 10.2 or earlier.

I thought maybe it might have been the video card but I had it replaced and same issue and I have two other notebooks with the same exact hardware but different OS and they are able to use Adobe 11 just fine.

The issue is also present when using Linux (Ubuntu).

My configuration.

Operating system:

Microsoft Windows XP Professional

and

Ubuntu

Processor:

Intel T9300 2.5Ghz

Video card:

Nvidia GeForce 8700M GT

Memory:

4GB

I would like if someone could help me with this issue.  I am frustrated becasue sites are 'requiring / mandating' that I update to Adobe 11 but if I do so I cannot use part of the site, for example Facebook or Youtube.

Thanks in advance for any feedback....