"I am getting daily calls from customers who a being scammed over the phone, from a fake company in India. They claim to be calling from Microsoft, BT or Global support and say your computer is infected, slow, or some other rubbish.
They offer to take over your computer. NEVER ALLOW THIS
They demand payment details over the phone. NEVER DO THIS
[If you do] they can lock your computer with a password, if you put the phone down on them."
Please be careful - We have now all been warned...