No System Reserved Partition but there is 500mb unallocated space

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  1. anandbb
    Posts : 25
    Windows 10 PRO 64 Bit
       New #1

    No System Reserved Partition help?


    disk management isn't showing system reserved partition but there is 500mb unallocated space only.

    No System Reserved Partition but there is 500mb unallocated space-disk.jpg
    Last edited by anandbb; 19 Jan 2020 at 02:59.
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  3. dalchina
    Posts : 43,091
    Win 10 Pro (22H2) (2nd PC is 22H2)
       New #2

    Do you know that you definitely had one? Presumably if your Windows is booting, all is basically well.

    Windows can be installed without creating one at all: see the end of this:
    What is the System Reserved or EFI Partition in Windows?

    Has it been removed?
    TeraByte Unlimited Knowledge Base
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  4. anandbb
    Posts : 25
    Windows 10 PRO 64 Bit
    Thread Starter
       New #3

    dalchina said:
    Do you know that you definitely had one? Presumably if your Windows is booting, all is basically well.

    Windows can be installed without creating one at all: see the end of this:
    What is the System Reserved or EFI Partition in Windows?

    Has it been removed?
    TeraByte Unlimited Knowledge Base
    Yes Window is booting fine.... But today when I opened disk management I noticed there was no system reserved partition..
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  6. dalchina
    Posts : 43,091
    Win 10 Pro (22H2) (2nd PC is 22H2)
       New #4

    And was there one previously?
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  7. anandbb
    Posts : 25
    Windows 10 PRO 64 Bit
    Thread Starter
       New #5

    dalchina said:
    And was there one previously?
    I don't think so....bcoz after installing fresh windows I never checked disk management and today was the first time
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  8. dalchina
    Posts : 43,091
    Win 10 Pro (22H2) (2nd PC is 22H2)
       New #6

    Then I suggest there's nothing to worry about.
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  9. anandbb
    Posts : 25
    Windows 10 PRO 64 Bit
    Thread Starter
       New #7

    dalchina said:
    Then I suggest there's nothing to worry about.
    Okay but why there is a 500mb unallocated space? And what should I do with that?
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  10. topgundcp
    Posts : 2,799
    Linux Mint 20.1 Win10Prox64
       New #8

    Looking at your disk management screen shot. Your C drive is marked as System, Boot, Active... Meaning Windows Boot Manager is in your C: drive.

    A normal Windows installation with your disk setup as unallocated then Windows will create a System Reserved partition and put the Boot Manager and Windows Recovery (WinRe.wim for disgnostic, troubleshooting). In addition, if you use Bitlocker then you'll need the System Reserved present. If you have no problem running Windows then you shoudn't worry about it. However, if it bothers you, you can easily move the Boot Manager to the 500 unallocated partition.
    1. Create a simple NTFS for this unallocated partition, format and assign a Letter to it. let's assume Letter Z is assigned.
    2. Open admin command prompt and type: bcdboot C:\Windows /s Z: /f BIOS
      The above command will mark Z: drive as active and move the Boot Manager there. Once done, remove the letter Z: and label it as: System Reserved.
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  12. anandbb
    Posts : 25
    Windows 10 PRO 64 Bit
    Thread Starter
       New #9

    topgundcp said:
    Looking at your disk management screen shot. Your C drive is marked as System, Boot, Active... Meaning Windows Boot Manager is in your C: drive.

    A normal Windows installation with your disk setup as unallocated then Windows will create a System Reserved partition and put the Boot Manager and Windows Recovery (WinRe.wim for disgnostic, troubleshooting). In addition, if you use Bitlocker then you'll need the System Reserved present. If you have no problem running Windows then you shoudn't worry about it. However, if it bothers you, you can easily move the Boot Manager to the 500 unallocated partition.
    1. Create a simple NTFS for this unallocated partition, format and assign a Letter to it. let's assume Letter Z is assigned.
    2. Open admin command prompt and type: bcdboot C:\Windows /s Z: /f BIOS
      The above command will mark Z: drive as active and move the Boot Manager there. Once done, remove the letter Z: and label it as: System Reserved.
    Is it possible that system reserved partition is somehow merged with c drive?
    Last edited by anandbb; 19 Jan 2020 at 08:26.
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  13. topgundcp
    Posts : 2,799
    Linux Mint 20.1 Win10Prox64
       New #10

    Is it possible that system reserved partition is somehow merged with c drive?
    Yes. The easiest is to download the portable, free DiskGenius:Free Download DiskGenius Online
    Run it and Since this is Windows partition, you might not be able to run online, click on the File menu to boot into WinPE enviroment.
    Right click on the 500MB unallocated space, select Allocate free space To -> then select C: drive. click on Save All then reboot.
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