I had Win7,8.1 and 10 (all Pro versions) multi-booting well on my PC. Each OS lives in its own SSD, so had 3x SSDs plus a disc-based HDD 2TB for data storage.
I needed more space so added a 1TB 3.disc-based 5" HDD. To get the thing to fit I had to move the SSDs containing Win8.1 and Win10 - may have changed one or both of the SATA ports for these (the mobo has 10 SATA ports).
After that only Win8.1 would boot from the OS menu. I ran Easy BCD 2.3 and reset BCD config only to find then that no OS would load. Eventually I found if I set the SSD containing Win7 as the only boot device in BIOS/UEFI then I could boot Win7. I added WIn8.1 and Win10 to the EasyBCD boot menu but found that only Win7 would boot. The other 2 give an error about \system32\winload.exe being changed and said to disable signature verification (unsigned drivers) - not possible when Win8.1 or 10 are chosen and one presses F8 to bring up this option (the "Safe Mode" etc menu only displays if Win7 is selected, not the other two OSs).
In EasyBCD I enabled "Allow use of unsigned drivers on 64-Bit WIndows" for Win8.1/10 but it still does not allow them to boot.
Any suggestions?
TIA
I needed more space so added a 1TB 3.disc-based 5" HDD. To get the thing to fit I had to move the SSDs containing Win8.1 and Win10 - may have changed one or both of the SATA ports for these (the mobo has 10 SATA ports).
After that only Win8.1 would boot from the OS menu. I ran Easy BCD 2.3 and reset BCD config only to find then that no OS would load. Eventually I found if I set the SSD containing Win7 as the only boot device in BIOS/UEFI then I could boot Win7. I added WIn8.1 and Win10 to the EasyBCD boot menu but found that only Win7 would boot. The other 2 give an error about \system32\winload.exe being changed and said to disable signature verification (unsigned drivers) - not possible when Win8.1 or 10 are chosen and one presses F8 to bring up this option (the "Safe Mode" etc menu only displays if Win7 is selected, not the other two OSs).
In EasyBCD I enabled "Allow use of unsigned drivers on 64-Bit WIndows" for Win8.1/10 but it still does not allow them to boot.
Any suggestions?
TIA