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

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).

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?

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.

Ok, non-UEFI- legacy BIOS, no AHCI.

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.