Hi Jenny. Appreciate your response, which is absolutely correct. However it was not the resolution to my problem.
My issue was resolved by doing 3 things:
First, I removed 3 programs that provided driver updates and/or 'cleaning' of the laptop environment of unwanted files, etc., and rebooted;
Second, reset of the HPQ70 Firmware to a previous default version;
Third, unchecking the number of processors and maximum memory boxes identified in the Boot 'Advanced Options' and restarting. This released the memory reserved for hardware and left 27.8GB available for programs. Apparently one of these programs modified the environment and another updated a driver that did not improve things. The laptop is speeding along as it used to.