Originally posted by enahs:
or, you can try this registry hack; it'll disable the screensaver when defrag runs:

hkey_users\.default\software\microsoft\windows\cur rentversion\applets\defrag\settings

create a string value named DisableScreenSaver and set it's value to yes.
if you could only tell me how to do this to disable the "Scandisk has stopped and started 10 times, yada, yada" message and I'll bake you my famous brownies!