My sister-in law Works for a University.
She had an instruction come up on her screen saying her ' Inbox ' was full and she needed to delete some to make space.
When she tried to do this, another box appeared saying she would need to re-enter her windows log-on code to be able to perform the task.
As everything looked convincingly good, She did !
Then all hell broke loose on her computer.
Beware ! ! ! ! ! ! ! ! ! ! ! !