The first time I open "My Computer" after a reboot, a blank gray window opens and nothing happens for about a minute. No searching flashlight icon appears. After a minute, the window populates normally. "My Computer" will reopen normally thereafter. If one attempts to kill the "My Computer" task during this interval, the entire windows shell disappears for about a minute, then returns. The computer is on a Workgroup with three networked drives.
I've searched this forum and web for answers, and tried suggested fixes without success. One popular fix was to disable the Windows Image Acquisition service; but it already is disabled on my machine. I have Norton 360 v2. I've scanned the machine with sfc and scandisk; scanned for viruses, even disabled Norton 360 without success.