Interesting gambit:
Get rung up by a voice with a thick accent ( you can guess the origin ) claiming that my computer is generating errors and reporting them to M$soft. Offers to send a technician to help fix the errors and restore computer to "full working order". Cannot give details about which computer is generating the errors. Cannot send a transcript of the error log to me - does not know my email address. But has my name, street address and phone number - which anyone can get by looking in the phone book. Assumes my computer is running Windoze, but does not know which version. Suggests I run the error log report using eventwvr, which does show a few errors and warnings, but then I know about those, and M$soft specifically says that errors from this log are never sent to M$soft.
A good way of getting a bit of work and money ?
An even better way of getting entry to a house with a view to casing the joint ?
Maybe I'm just too suspicious.