I did get to have a bit of fun though, she asked me turn my computer on (which i was in front of at the time). i asked her to hold on and googled the scam. after a couple of minutes picked up the phone and she was still there. was quite a good laugh asking loads of technical questions and hearing her trying to make up answers on the spot.
I think its about time to get my number removed from the directory, i hope this stops it. Ive had about 4 scammers ring in the last month. its bad enough having my bank, insurance etc calling to sell me extra carp.