Found another thread and think I may have got pepper flash installed - in control panel/programs it lists Adobe Flash Player 15 Pepper. It's made a difference as now when I try and play a swf vid in FB I get an error mesg - "couldn't load plug-in".

The Opera plug-ins entry reads -

Adobe Flash Player
Version: 15.0.0.183
Shockwave Flash 15.0 r0
Disable
Location: C:\Windows\system32\Macromed\Flash\pepflashplayer321500183.dll
Type: PPAPI (out-of-process)
MIME types:
MIME type Description File extensions
application/x-shockwave-flash Shockwave Flash .swf
application/futuresplash FutureSplash Player .spl

Thanks for the replies. sgunhouse - the only flash it found was Adobe Flash Player. I've Googled for a pepper flash download but can't find one.