I think you're being a little disingenuous here.
Current versions do not. Older versions did. We've already determined this is an older version. If it was installed in conjunction with SP, then really there are injections and the like. For all we know he could be using one of the script versions, from before there was even an installer package...
As for a "test" about BP, we have that test: We ask if someone has it installed. When dozens of people have issues with it, and the question at hand is about changes happening that are known to be caused by BP, a test is far from needed.
As you've noted multiple times in your own thread, sometimes it will take more than one reboot to "fix" issues around install/uninstall of BP. Also, if this version of BP is old enough to be using 125Mhz, it's probably also old enough to have uninstall issues as well (there were many versions that didn't clean up after themselves very well). Which means that even uninstalling it may not have cleaned it off his system.