I have not seen this problem, but I found the following link, which I quoted from below. I hope it helps, for I have no other ideas otherwise.http://www.experts-exchange.com/OS/M..._21587254.html/quoted from above link:====What are those little overlay icons?Windows XP ships with a number of icon overlays.* A small arrow. Everybody knows this one: It's the shortcut overlay.* A hand, palm up. This is the "sharing" overlay. A folder with this overlay is the root of a file share.* A downward-pointing blue arrow. This is the "to be written to CD" overlay.* A pair of blue swirling arrows. This sometimes baffles people. This means that the item is available offline. (You have to enable offline folders to get this.)* A black clock. This really baffles people. This means that the file has been archived to tape and will take a very long time to access.The black clock is particularly baffling because you sometimes see it even if your system is not equipped with Hierarchical Storage Management. When this happens, it's because some program (typically a setup program) didn't check error codes properly.I hope this helps someone in the future. Thanks for tryingWilliam
Because a single overlay is applied to the taskbar button instead of to the individual window thumbnails, this is a per-group feature rather than per-window. Requests for overlay icons can be received from individual windows in a taskbar group, but they do not queue. The last overlay received is the overlay shown. If the last overlay received is removed, the overlay that it replaced is restored so long as it is still active. As an example, windows 1, 2, and 3 set, in order, overlays A, B, and C. Because overlay C was received last, it is shown on the taskbar button. Window 2 calls SetOverlayIcon with a NULL value to remove overlay B. Window 3 then does the same to remove overlay C. Because window 1's overlay A is still active, that overlay is then displayed on the taskbar button.If Windows Explorer shuts down unexpectedly, overlays are not restored when Windows Explorer is restored. The application should wait to receive the TaskbarButtonCreated message that indicates that Windows Explorer has restarted and the taskbar button has been re-created, and then call SetOverlayIcon again to reapply the overlay.