I'm having this issue with my laptop, and I can't really tell weather I'm infected or not.
Here's the situation: A little while after the laptop boots on Windows 7 desktop, I noticed that if I press the alt-tab key combination for task-switching, there's another task running besides "desktop".
This task is seemingly unselectable. (whenever I highlight it using alt-tab, it always switches back to deskop. Same thing happens if I try to click on it while the alt-tab task switch screen is displayed).
The task in question is also unnamed ! (I'm only seeing its "icon"), and therefore I can't google it to find information about it and determine if it's there due to a virus infection, or not.
I thought about trying to determine how it's named by using the task manager, but randomly killing processes until I find the correct one doesn't seem the right way to solve this problem.
Hopefully this task will be something harmless (maybe a program that I set up to load every time windows 7 boots, but then completely forgot about it... ).
I should also mention that I didn't get any virus or malware warnings during my latest scan just a couple days ago (I'm using mcafee & MS security essentials, but just to be on the safe side I wanted to try something different, so I recently deactivated them and installed the free versions of Avira & MB antimalware - which also came up with nothing !)
The only other piece of information I can provide, is a screenshot of my task-switch window (taken right after my laptop has booted to the desktop), which shows both the desktop and the "other" task, highlighted over at the left.
Hopefully someone will recognize what this is by looking at its icon, and be able to provide further info: