Thanx, joeg, for your suggestion...but resolved it.
The computer I'm using is 1 I'm upgrading for a friend...added some memory, reinstalled the OS and generally doing maintenance on it.
Turned out I finally discovered someone (like his kids) had gone into the BIOS and CRANKED it...but now have that sorted out.
As for BHO Cop...have used Adaware for some time and have installed (& run) a trojan detector that works well.
I also run with Internet Explorer 3rd party browser extensions disabled and regularly flush the Downloaded Program Files directory...