I appreciate everyone's thoughts on this one; the problem repeats next day even if Kaspersky and 360 were first deleted. I have since reinstalled. I did also check the BIOS which is up-to-date.
Now the fact that the computer always reports the on-board LAN as present But cannot supply it with resources on first boot of the day seems really odd. Once I reboot, the LAN hardware is installed and it never fails even if I need to perform multiple reboots for upadates (and for testing this amazing mess.)
alyoshka, thank you as you have given me an idea of something to try! I am going to pull the jumper for the on the motherboard LAN and install a PCI bus linksys network card and see if this silly foible vanishes. If it continues the fault is software if gone the fault is hardware. Thanks to all - Mike