Spybot search and destroy Operating Questions

Not sure if this is the correct place to ask this Q. but here I go:

I have Spy bot search and destroy on my computer. I run Windows XP home edition, with service pack 2.

I have had search and destroy for a year, it does a good job! but, it runs a scan every time I boot up my computer, and it is running a scan right now, at a time when I don't want it to!
I am not able to find the location of where I can control when it runs a scan, I don't like these automatic scans.

plus, spybot is no longer responding to my clicks of 'exit Spybot command' ?!! why????

Some History :
When I first installed Spybot, I would have it scan the hard drives while I slept at night, in the morning, I would deal with the findings and then I would then exit the program. B/C leaving spybot up and running, causes a severe lag in the response time I experience with my computer's key strokes, mouse movements, and mouse 'clicks'.....making me not happy at all...and is the second reason I want to be able to turn spybot off and on at my choosing!

How do I regain control of Spybot?

Where does Spy bot reside on my hard drive?...B/C searching does not find a file named Spybot....why is that?

Flywelder
8-06-2010