Email tms@bbc.co.ukpublished at 16:07 British Summer Time 22 April 2015
Edmund Tapfield: The Windows-D shortcut leaves you with a blank desktop, which looks distinctly suspicious. Might I suggest having a complicated-looking spreadsheet open in another window, and hitting Alt-Tab instead?
Evan Byrne: I'm keeping up with the text commentary on my mobile phone in the office in Piemonte - looks like a message for work and the screen goes blank after a few seconds anyway, so no-one can see it. Easy.