I am no real expert into the ins and outs of Spybot. I can suggest checking for possible conflicts with Teatimer from other apps. It is strange as Teaimer does not have this effect on my machine - what is your system spec. what OS etc?
From my experience the only thing a can suggest is switching Teatimer off, try a bootup and check the time - if the problem has been fixed, you may have to do without Teatimer (as long as you have a decent AV software you should be fine). If the problem still exists try looking elsewhere on your system for your problem.
Regards,
Jim