muckshifter:
So sorry. I mixed you up with the original poster. Sorry to hear about Nettie, too. Seems you are sure it is not a malware in action. I would never think explorer that smart to do such things on its own, but it never seizes to amaze me. The only other place that I can think of such weird behaviour would be the registry.
pegvanore:
The PC has something, though. Since this behaviour seems to be associated with specific file extensions (.jpg, .gif, .bmp?) it may be worth looking into the associations of those files. I would try to associate them with something harmless (i.e. Notepad) reboot and change the associations back to where they belong. Long shot, but harmless.
If you would still like to take a look at your processes from the Task Manager, the best way to do it would be with Paint open, to invoke him during the problem (and after) select the processes tab and <alt><Print Screen> and Paste to Paint. Immediately go back and <alt><Print Screen> the rest of the processes and paste them also to Paint.
PS Could someone tell me how to use quotes and smilies in this forum?
Thanks