Thanks, guys, for the advice. My internet failed yesterday and I've just loaded up again. Just read your post, John, and I bust out laughing at my ignorance! UAC...never heard of it before...but you directions are so clear that I should have no difficulty in following them.Even an old dude like me can learn! Thanks for your help. I will read about a dozen times and give it a try later today.
I do feel though that 2012 has been corrupted somehow. 2011 seems to have only one exe. file missing. But, I'll give it a go. Got nothing to lose!
Better go and put the rubbish bin out before the truck comes or my life won't be worth living.

Jazzvibes