I had this same problem. My PC system had PC Doctor as an EOM install with Windows 7, but when I upgraded to Windows 10, it was removed. Later, I think I did a clean install of Windows 10, so there were no remnants of the previous install. I downloaded and installed PC Doctor Toolbox, inserted the Key for activation and added my e-mail address and then the tool started an initial scan of my system and suddenly I got the Bad Pool Header blue screen. I used Revo Uninstaller (removes all traces of a program) to uninstall PC Doctor Toolbox and then reinstalled PC Doctor Toolbox with the same result. Eventually, I found the long list of potential issues that cause this error. The diagnostic process I followed was focused on a memory or memory mapping issues: 1) check memory - which passed, 2) remove drivers (except keyboard and mouse) [which would have been followed a long list of other things to try]. But step two fixed the problem. With the drivers uninstalled, I was successfully able to install PC Doctor Toolbox, activate it and successfully run the initial setup scan, restarted my PC and then run PC Doctor for a complete scan of my system. Not 100% sure, but It looks like one (or more) of my drivers had a memory mapping issue which was resolved on restart. Regardless, my problem is gone.
alphastealthhwsw