Green Circle With White Check Mark On Desktop Icons

The icons on my desktop have a lock in the lower corner. Indicating that they are not to be shared. This lock randomly switches to a green check mark or to a grey X or sometimes to the file shared icon. Different ones switch to different icons when it happens. So not just the folders or just the shortcuts. But all desktop icons. The main icon picture stays the same, it's the lower corner spot that changes around randomly. The little arrow that indicates that the icon is a shortcut. This even happens on my game icons. Is this a sign of a malfunction or maybe mal-ware? I do not have Mozy or Norton installed. Running Win 7. When I turned on my PC today a AMD update was prompted. Assuming it was for a driver update, I clicked ok. Even though I uninstalled and reinstalled my driver yesterday, to try and fix a flickering problem. The update looked legitimate. Today I also uploaded and downloaded a small video file from "Bloggif.com". While I was trying to create an animated .gif. The animated .gif worked. This seems like one of those things that happens when I don't know that my pinky finger is resting on the ctrl key. But can't figure out how to keyword troubleshoot through Google.