The Windows installer accepts that there’s no room for System Reserved partition and installs Windows onto a single partition.

When it comes time, point the Windows installer at the partition you created. Rather than create a new partition in unallocated space from within the Windows installer, you can create a new partition that consumes all unallocated space by using another disk-partitioning tool before running Windows installation. If you really don’t want this partition on your drive-for whatever reason-the ideal thing to do is prevent it from being created in the first place. Prevent the System Reserved Partition From Being Created You really shouldn’t mess with the System Reserved partition-it’s easiest and safest to just leave it be. RELATED: Beginner Geek: How to Reinstall Windows on Your Computer Can You Delete the System Reserved Partition? The partition is typically created during the Windows installation process, just before the installer allocates space for the main system partition. The System Reserved partition consumes 100 MB of space on Windows 7, 350 MB of space on Windows 8, and 500 MB of space on Windows 10. When Windows Creates the System Reserved Partition Important boot files are also stored here by default, although you could store them on the main Windows partition if you preferred. The System Reserved partition is essential if you want to use BitLocker drive encryption, which can’t function otherwise. Your computer boots the unencrypted System Reserved partition, and then decrypts the main encrypted drive and starts the encrypted Windows system.

The startup files used for BitLocker Drive Encryption: If you ever decide to encrypt your hard drive with BitLocker drive encryption, the System Reserved partition contains the necessary files for starting your computer.

RELATED: How to Use BitLocker Without a Trusted Platform Module (TPM) Your computer starts the boot loader off of the System Reserved partition, which in turn starts Windows from your system drive.

The Boot Manager and Boot Configuration Data: When your computer starts, the Windows Boot Manager reads the boot data from the Boot Configuration Data (BCD) Store.

The System Reserved partition contains two important things: What Does the System Reserved Partition Do? The partition is also created on Windows Serer 2008 R2 and newer Server versions of Windows. The System Reserved partition was introduced with Windows 7, so you won’t find it on previous versions of Windows. RELATED: Understanding Hard Drive Partitioning with Disk Management Windows doesn’t normally assign a drive letter to these partitions, so you’ll only see them when you use Disk Management or similar utility. Windows 7, 8, and 10 create a special “System Reserved” partition when you install them on a clean disk.

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