Indian cold callers claiming to be from Microsoft at it again!

They appear to target an area for a while before moving on, claiming to be  from microsoft and that you have errors on your computer and that they will fix it. At least one case I know, they put a password lock on the computer to stop the person logging on and then demanded £400. This is an article I wrote on 2010

https://pcrescue.wordpress.com/2010/06/12/latest-phone-scam-asian-cold-caller-trying-to-take-over-my-pc/