Looking to buy items on the net, I find that when I "click to enlarge" I get a warning sign (red circle with line through) and I cannot enlarge the photo. My other computer allows this, why cant this one do it ? Os is ME. Cheers
As Belatucadrus says, this could be a pop up blocker.
This is the normal reaction shown by Panicware's 'Pop-Up Stopper' program. I find that, with this particular progam, if immediately after you see the no entry sign you click the item a second time it takes this as an overide for one click only ie the next time you click on anything that generates what it considers to be a pop-up, even on the same page, it blocks it.