When my PC is on and left unattended the Windows Search feature automatically opens. This seems to happen sporadically; I have not been able to detect a pattern. This has happened since I received my Dell Dimension and set it up. On 2 different occasions the calculator feature has opened. I have up-to-date Windows service packs, Norton Internet Security, Adware, Spybot, and Windows defender running on my PC. I am using Zone Alarm and a router fire wall. Is there a setting that can be causing the search function to automatically initialize? Could this be a virus or spy ware despite all the precautions I've taken?