[ddouglass]

Since Hoster integrates with a lot of things in the computer and software, that isn't an easy question to answer.
What were you doing at the time it shutdown?
Do you have any other programs open?
What is the speed of your processor and how much Ram do you have?
Did you do all the updates/changes required for Hoster to run correctly?
What else is on the computer that may be running in the background?
Is this an upgrade to Windows 7 from Vista or a new full install?