My main pc has Windows 8.1 Pro on it and I had installed 10TP on an old Optiplex 745 (souped up pretty good). Got tired of going from machine to machine so decided to try something a bit different. Installed the drive from the Optiplex into my main machine as a 2nd hard drive (really a third counting the mSata drive). Made sure the original 8.1Pro booted up nicely, then set the bios to boot from the newly added 10TP drive. Figured it would blue screen. But it didn't. Instead it just took awhile to boot due to installing new hardware and reconfiguring. The hardware changes were substantial but 10TP handled it just fine. All I had to do was uninstall some Creative software that went with the older pc and then an automatic driver search for a piece of the onboard sound system. Next I booted back to 8.1 again using the bios boot selection. In 8.1, I used EasyBCD to add a 2nd entry for the 10TP drive. Then tried to reboot to 10TP. It won't complete the boot as I get an error telling me that winload.exe does not have a correct signature. Everything else works just fine, both OS boot so long as I choose them as the boot drive in bios. Anyone have a suggestion as to how I can fix the winload.exe issue using EasyBCD or other?? We need a new build release... I'm obviously bored.