An explanation of what's been going on: your computers are safe…

Basically we had an incursion by a spammer bot, which is a virtual creature interested primarily in installing a huge number of links on sites. The 'bot prowls the web looking for sites, in this case WordPress sites—sort of like the oldtime burglar [in the era before electronic locks:] who has once checked into a hotel room, pretends to have lost his key, and then once the hotel installs a new guest in that room—uses his key to burgle the room. Or in this case, it came in via a chink in the...