hotmail - authentification notice

[percy]

Hi
Recently I've been getting a window popping up from Hotmail asking me to type in the characters from a window, in order to verify that I'm not a machine... This wouldn't be so bad if it was once every few weeks, but it's happening 2 or 3 times a day, then I have to re-attach files before sending. Is there any way of disabling this or is it a spoof message as part of a virus? It only seems to happen on my laptop running XP and not on my PC running ME.
Ta

[dick dastardly]

I use Hotmail all day every day and I've never seen that. Sounds a wee bit dodgy to me.

[percy]

It appears to be a genuine .NET notice - can't see anything obvious.
ZoneAlarm and McAfee haven't picked anything up

[lanciachris]

Im getting this frequently, I figure its because I use a variety of the web interface and via Outlook express.