Large broadband download whilst computer is off (anyone else??)

[NeilM]

On Friday (2oth April so IDNET inform me) I had over 1GB download whilst the computer was off at night.(also had over 2GB of download on Friday, even though was only using computer for email, light download (*.doc and *.pdf etc)).

I use a wireless router (had not set security on it).
Is most likely cause wireless use by others (i live close to other houses)?
Or have other people experienced similar large downloads whilst computer is off

?Any thoughts?

NeilM

[Rik]

Crosspost - replies here please.