Boot manager iqnoring windows 7 drive

techman05 wrote: Clearing cmos didn't seem to work and my media stuff that I have to use are on a seperate drive so I'm reinstalling windows 7(I at least have the updates and drivers [somewhere]). Also wondering since if the card had anything to do with my booting failure will removing fudge it up again? With all the talk about windows 7 use I'm more peeved there is not a windows 7 compatibility mode for this or clear the loader in the bios [uefi] menu.

Curious about a few things:

Which OS were you using when you did the firmware update on the new video card? Or did you mean a firmware update for the mother board?

If it is the video card, it's strange that a firmware update would cause some kind of change in the boot order, or the Boot Manager settings. That alone is mysterious, and knowing if removing the video card will again change the default booting OS, who knows.

Were you unable to boot your Windows 7 installation by any means after the video card firmware update? I'm wondering why you are installing Windows 7 again.

Were the entries in Boot Manager for both drives/OS installations apparently unchanged after the firmware update?

If the new video card is UEFI compatible (has a UEFI compatible VBIOS, which is now common), and the Windows 10 installation if UEFI booting (probably is), but the Windows 7 installation is not really a UEFI booting installation, that may be why Windows 10 booted instead of Windows 7. The UEFI booting issue with the Windows 7 installation media, particularly if it is from an original Windows 7 optical disk, is real, there are guides on the Internet for fixing it. For example, look at sections 10 and 11 in this guide:

https://www.eightforums.com/tutorials/15458-uefi-bootable-usb-flash-drive-create-windows.html

You may be able to clear the Boot Manager feature by setting all its entries to Disabled, and then Save and Exit the UEFI/BIOS to truly apply those settings. Then go right back into the UEFI again, and reset the Boot Manager entries as you like.

If you start Disk Management in Windows 10, and check the partitions on the drives that have Windows 7 and 10, do you find an EFI System Partition on both drives and OS?

I don't understand what you mean by a Windows 7 compatibility mode, for the Boot Manager?

techman05 wrote: I set up my skylake +6 motherboard to use the manager to boot between windows 10 and windows 7. I installed an amd rx 560 graphics card and now after a firmware update and restarting for driver updates thw sysyem boots right into windows 10 even though I select widows 7 in the boot manager. Windows 7 is the default boot drive in the manager. Is there a way to clear the boot manager. They were both installes using an uefi dvd drive. Thanks

Try removing the board's battery while moving the CLR CMOS jumper to the clear position.

Should have used the CLR CMOS jumper when you installed the graphics card. While you can get away with not doing it with Win 10, Win 7 is another story.

Windows 7 does not support UEFI booting, unless you use a Win 7 ISO, and fix the location of the EFI bootloader file.