Gents,
Finally had time to sit down and try your suggestions. The task manager revealed a program that I very seldom use that turned out to be the culprit. Disabled it and the problem went away. When I had the larger hard drive installed, a mirroring software was used to transfer everything from the old drive to the new. Apparently, this rogue program decided put its hand up for attention.
Thanks very much for you insight and expertise to solve a simple problem. 👍