When I pulled up task manager a process - I think using rundll.exe was running and disappeared shortly after opening the task manager. I have noticed a lot of times when I open the task manager whatever was hung up on my computer suddenly starts working. This leads me to wonder if some malware is designed to automatically shut off if the task manager is opened as users are getting hip to the fact that extraneous processes running could mean trouble...
Would be nice to have a button in task manager to easily get to some log of what was recently running on your computer as well as what is currently running.