Boot Time Scan... No monitor signal??

Ok jsut installed AVAST Home

on trying to run a boot time scan I’m getting a “No signal” message on my monitor and no disk activity although the machine is powered up on resetting it boots into windows fine.

Any ideas?

Thanks in advance

MA

Is it reproducible?
What operating system do you use?

Thanks for the reply

Yes its reproducable, yeach time I set it too boot time scan it does the same

XP sp2

MA