I found a work-around, but it doesn't solve the issue. If I enter the BIOS (UEFI) and change to legacy only the system will start Win7. To boot back into Win 8.1 I have to enter UEFI again, change to UEFI and legacy. Also, chkdisk wants to run when I boot into Win 7. *sigh*
I have a new system with a HD from an older system with win 7 32x. I reformatted another (1T) HD and installed win 8.1 64x. Win 8.1 did not add win 7 to its bootloader, so I added it manually using bcdedit. Win 7 shows up when win 8.1 starts, but won't boot and goes into repair mode (that also...