-pops- Thank you for your helpful advice. The mail in question was PROBABLY not unsolicited, because I think (a vague recollection!) that I subscribed to a Microsoft Newsletter way back, and this e-mail had that sort of tag on it:
To cancel your subscription to this newsletter, either click mailto:[email protected]osoft.com?subject=UNSUBSCRIBE to send an unsubscribe e-mail or reply to this message with the word UNSUBSCRIBE in the Subject line. To stop all e-mail newsletters from Microsoft.com, either click mailto:[email protected]osoft.com?subject=STOPMAIL to send your request or reply to this message with the word STOPMAIL in the Subject Line. You can also unsubscribe at click here. You can manage all your Microsoft.com communication preferences from this site.
But, it is presumably easy to impersonate Microsoft.
crx 1600 - Yes, it was from a Stuart Okin!
leo 49 - how do I know that it is genuine?
Thanks to you all for your interest, and I will let you know what Microsoft have to say - hopefully within two or three days.