A friend at PC Techniques sent me a warning

http://www.zdnet.com/blog/security/adobe-beware-of-fake-flash-downloads/1648

Personally I don't install Flash on Firefox Portable but it has to be disabled because some sites detect it as needing updates so you have to disable it then they kick down to HTML5.

All Mac users I have warned 12 months since (a Mac targeted Flash Block add-on carried a virus payload) declared the usual "Macs don't get viruses". One even told me he didn't need AV but had install "Sophos Defender" citing Office viruses as a vector. Hmmmm. "What's in a name?" When will the Apple evangelist realise that the bigger the target the bigger the payoff? PCs still offer by far the biggest target and the miscreants play the percentage game. And the gullible are a big percentage.

Curiously I had two stories that were either Bitlocker or Cryptolock viruses. And in both cases they assumed Micro$soft would ask (out of the Blue) for all their personal details despite having some of them. One was a very intelligent guy, but was under pressure organising stewards at a festival.
It is that easy to be fooled.
I always tell peeps that Micro$soft only respond to your requests, never act proactively. But it falls on deaf ears sometimes.