Girlfriend just phoned me in work saying a company called 'Tech On Support' has phoned and was very persistent saying we had 'Trojans' on our home comps. Then trying to sell us a 'warranty' of sorts.
Just done a little research on them, seems dodgy at best, anyone heard of them, had any warnings?
Beware if they call you, seems random...
http://www.phonespamfilter.co.uk/search.php/01865521001