In IE 10.0.9200.16736 FP is shown as v. 11.9.900.152 and it is listed as enabled. I use Windows 7.
However, it does not work, specifically when trying to view videos on the bbc.co.uk website and others.
FP works in Google Chrome.
I recently uninstalled Flash Player after a security alert, but found I needed it so re-installed it.
What else do I need to do?