My mum has just phoned saying that when she turns the computer on, it puts the background black, where they use to have a picture, and she said "loads of words/number pop up", and it says something about UNSETUP.EXE

Anyone know what that is?!

Its a key logger, though it doesnt explain the black screen, the whole idea of keylogging was espionage.  

http://www.spywarepoint.com/spyware/Absolute_Keylogger/

how would it have got on there you think??

Im sure they only look at Boating Weekly etc! Easily removable?

edit: Arr, says how to with the link.