martyyn: Just had a call from a friend of mine. They've just been done for $500 this morning. They are intelligent people but knowing nothing about computers thought it was legit.

I'm just on my way around there to assess the damage.

I assume it's just a case of removing teamviewer and any malware installed? They've contacted their banks etc, and we'll be changing all passwords etc.

Often they run Teamviewer and do simple things like run check disk, defrag...etc.  Best to clean the whole system just to make absolutely sure though.