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  1.    09 Feb 2017 #1
    Join Date : Feb 2017
    Posts : 8
    Win 10 (64-bit)

    How to remove System Partition Windows 10 (64-bit)


    Dear all

    I want to create new partitions to manage my files/folders. I read that it is not possible to create more than four partitions. I want to remove the System partition if it is possible.
    So after some google search, I came across a sevenforums thread where they suggested to first create windows recovery disk (usb) and then remove system partition through diskpart, and then repair windows through the recovery disk. Is this solution can also be done on win 10? or should I try something different. I've also attached disk management screenshot.
    Please help me with this.
    Thanks

    Click image for larger version. 

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      My ComputerSystem Spec
  2.    09 Feb 2017 #2
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,025
    Win 10 Pro (1703)

    You should not even think about removing or modifying partitions created by the OS for the OS.. nor do you need to.

    Your partition structure looks worryingly wrong.

    Assuming your System partition is the System Reserved partition (and I'm not sure it is) it shouldn't have a drive letter.

    What is it?
    What is the System Reserved Partition and Can You Delete It?

    You should also have a 450Mb Recovery partition (in addition to what I presume is your manufacturer's recovery partition) which provides automatic repair and troubleshooting options if you do a SHIFT click restart for example.

    As to the number of partitions, this is an approximate guide. Note this depends on whether your disk is formatted using the older MBR system, or the newer GPT system.

    On the legacy "MBR" partitioning scheme, you can have 4 primary partitions, or 3 primary partitions and one extended partition containing any number of logical partitions. While you can assign a drive letter to a partition, you can also map it as a folder in current versions of Windows, allowing more partitions, or use subst to mount it to a number.


    The EFI specification mandates that a GUID Partition Table (GPT), which all modern operating systems support, is capable of containing a maximum of 128 partitions on any size hard disk. GPT is also required to boot from hard disk drives larger than 2 TB. This partitioning scheme is now widely used with UEFI being natively supported by practically all new computers.


    In addition to native partitions, Windows and Linux also have something called a "logical volume manager", which can overlay dozens, if not hundreds of virtual partitions (logical volumes) on top of the 4 (MBR) or 128 (GPT) physical partitions. Logical volumes can be assigned drive letters or mountpoints in the same way as physical partitions. They can also be bootable if certain constraints are met.


    It's also possible to have GPT-formatted disks on non-UEFI systems, and MBR disks on UEFI systems (with the exception of the boot disk).
      My ComputerSystem Spec
  3.    09 Feb 2017 #3
    Join Date : Feb 2017
    Posts : 8
    Win 10 (64-bit)
    Thread Starter

    @dalchina, Thank you very much for replying. Is there any way to correct my partition structure?

    Actually, I cloned my HDD to install this new SSD. I remembered that I choose MBR at some time. Keeping in view this situation, is it possible to have some new logical partitions or separate partitions?
      My ComputerSystem Spec
  4.    09 Feb 2017 #4
    Join Date : Jul 2016
    Crewe Cheshire
    Posts : 1,460
    windows 10

    Your simplest option is to reduce c and increase d for files the system partition is vital if you remove it then it won't boot a repair would just recreate it
      My ComputerSystem Spec
  5.    09 Feb 2017 #5
    Join Date : Feb 2017
    Posts : 8
    Win 10 (64-bit)
    Thread Starter

    Can I convert my disk to 'Dynamic disk' and then create multiple partitions. I am worried that if I store my data in these C and D then in case of windows failure it could be lost.

    P.S. I can't extend the space of D drive even after shrinking the space of C.
      My ComputerSystem Spec
  6.    09 Feb 2017 #6
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,025
    Win 10 Pro (1703)

    I would also guess you're not using AHCI (BIOS setting) which uses your SSD to best advantage. You cannot easily switch to using it if not.

    You should also look to generate a Win 10 Recovery partition. I know a way to do that, there may be an easier way, but I'm not sure.

    To test that you don't have one, read this,
    4 Ways to boot into Safe Mode in Windows 10 | Digital Citizen
    noting the blue screens of prompts, then
    try a SHIFT click RESTART.

    Do you see those screens?
    Last edited by dalchina; 10 Feb 2017 at 01:44.
      My ComputerSystem Spec
  7.    09 Feb 2017 #7
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,025
    Win 10 Pro (1703)

    Leave your existing D: alone. That's your manufacturer's recovery partition - lets you put your PC back to as bought, wiping all. It's not for your data.

    In the unallocated space you've created by shrinking C: create a new partition for your data.

    It's an excellent idea to have your data separate from the OS.
      My ComputerSystem Spec
  8.    09 Feb 2017 #8
    Join Date : Feb 2017
    Posts : 8
    Win 10 (64-bit)
    Thread Starter

    Yes I saw those blue screens with SHIFT click RESTART method. But you're right I am not using AHCI mode as my HP laptop is quite old now. It is actually HP Envy 17 3d series with i7 sandy bridge and H67 intel chipset, if this information is any helpful.
      My ComputerSystem Spec
  9.    10 Feb 2017 #9
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,025
    Win 10 Pro (1703)

    Ok, non-UEFI- legacy BIOS, no AHCI.
      My ComputerSystem Spec
  10.    10 Feb 2017 #10
    Join Date : Oct 2014
    New Jersey
    Posts : 1,387
    Windows 7 Pro x64 Windows 10 Pro x64

    No you can not convert your disk to Dynamic, and don`t try. I mean you can, but don`t

    And you should remove the letter from your System Reserved partition, it SHOULD NOT have a letter.

    There is no reason to remove the system partition, you`ll gain nothing and windows won`t boot anymore.

    You want more space, add another hard drive for data.

    The only thing you can do with your current drive is to create an extended partition with a Logical drive to the right of C after you shrink C.

    Do everything with Partition Wizard.

    DO NOT TRY TO MAKE A 5th PRIMARY PARTITION.
      My ComputersSystem Spec

 
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