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Windows boot priority and BOOTMGR problem.

Anonymous
2020-12-30T08:54:46+00:00

As you can see, my disks are a bit of a mess, as it's an old PC with old HDDs.

The problem: I'm trying to merge all the partitions in Disk 0, but I can't wipe drive C: because it has an old and corrupted version of Windows 7 that used to be my main boot device. I tried to set the drive to Inactive using DISKPART in order to wipe it, but that makes the bootup broken as it requires C: to be active. I've had to boot from a USB just to get to CMD to set it as active again. I'm not sure if it has something to do with BOOTMGR or anything, but any help would be welcome.

I want a way to be able to format C: to merge all Disk 0, and to merge those small, unused allocations.

Thank you.

Windows for home | Windows 10 | Devices and drivers

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  1. Anonymous
    2020-12-30T16:17:20+00:00

    You could add boot files to Disk 2 by running startup repair or executing a bcdboot command, but then you don't want the System drive to be C: while Windows is H:...

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  2. DaveM121 891.6K Reputation points Independent Advisor
    2020-12-30T15:02:25+00:00

    Hi aymendrk, glad to Help!

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  3. Anonymous
    2020-12-30T14:36:12+00:00

    Alright, I'll try that next. 

    Thank you, Dave.

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  4. DaveM121 891.6K Reputation points Independent Advisor
    2020-12-30T13:44:31+00:00

    Hi aymendrk

    Yes, that was going to be my next suggestion, but this time, when installing Windows 10 on that drive, disconnect the other drives temporarily, that will force the installation to put the boot partition on the correct drive, then you can merge the partitions that other drive . . .

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  5. Anonymous
    2020-12-30T13:27:01+00:00

    It's an old PC that has gone through a bit of refurbishing through the years, so I'm not surprised.

    I do have some large files that are important. I'll see if I can back them up, as I know that you'll recommend a clean reinstall on H: while unplugging all other drives. Am I correct?

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