Thanks chaps. Uninstalled the program itself and associated adware like FileFrog, via Control Panel, followed by a rinse with CCleaner. Seems to have rectified things.
In passing, one of the negative reviews of DVDStyler reminds me a lot of another program close to our hearts....see if you can guess which one I mean :hehe:;
"I don't know how long I've been using this program but it's been a few years. Used to be pretty good - not many bells and whistles but fairly reliable. The creator makes changes frequently without much testing and it seems to spiral downward into lots of features that don't work or don't work correctly and tons of issues that aren't addressed..."