Wilf -

I am currently using a computer with W98SE and do not have a problem with it shutting down when I tell it to do so. Of course, I am also using avast!4 Home. So, avast is not the problem. :slight_smile:

Perhaps this problem showed up after installing avast because your computer was already close to having this problem? ???

Years ago, I did have a shutdown problem with W98SE but installing the MS patch cured the problem ever since. ;D

While you are at Windows Update looking for this patch, be sure to get all other patches/updates available for your computer. :wink: