Hi,

There can only be 2 explanations:

1. Powering off the monitor sends a signal to the PC to go to sleep - I have never heard of that before, and am unconvinced that might be the cause.

2. Random freeze of MSE that is coincident with the monitor being turned off - this can be easily checked.

See if you can replicate the issue : run an overnight scan, and turn the monitor off again.

Regards,
Golden