If you receive any private messages on any big social networking sites, such as Facebook, Myspace or Bebo that say "You look just awesome in this new movie", don't follow that suspicous-looking link. 

The latest worm of the week is called Koobface -- why or for what reason, I'm not exactly sure. But it does terrible and mean things to your computer if you fall for its trickery.

"Facebook is already aware of this [new] threat and is purging the spammed links from their system. But with dozens of Koobface variants known to exist, the situation is likely to get worse before it gets better," wrote Craig Schmugar of McAffee anti-viral products, on a blog. "It's important to note that spammed links leading to Koobface are likely to come from infected friends, reminiscent of early mass-mailing worms."

This worm only came to light last week -- although most social networking sites seem to already be aware of it, similar worms are expected to be out there in the wild, so be careful. Don't click on any obviously suspicious links no matter how enticing they sound.