Carl,
Yes, I uninstalled antivirus and got rid of a USB wireless network adapter and USB wireless mouse/keyboard.
It’s a Lenovo M58 desktop, old enough that there are no manufacturer upgrades available. It started out as a Vista system that I upgraded to 7.
I suspect you may be right about the BIOS in this one. Although, I did see a lot of M 58 refurbs online running Win 10. Time to mothball mine.
Thanks for your thoughts.
Donna