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Windows 7: How to set System Reserved size on clean install.

20 Feb 2012   #1

Windows 7 Pro & Ultimate (64-Bit) Retail, Windows 8.1 Pro (64-Bit) Retail
How to set System Reserved size on clean install.

Hello everyone,

I'm currently running Windows 7 Pro 64 bit. I have a 55gb Windows Partition and a 300mb System Reserved partition.

I'm going to do a clean install next week and I was wondering if I can set the System Reserved partition size during installation, so I don't have to alter the partitions after windows is installed?

Hope someone can advise on this?


My System SpecsSystem Spec
20 Feb 2012   #2

Windows 7 Ultimate 64bit SP1


During clean install the system auto creates a 100mb system reserved "partition",so you don't need to do anything.

Have also in mind this,

The 100MB partition is a system partition and contains boot files.In windows Disk Manager will not allow you to remove this partition because removing this partition could cause the system to not boot.

Attached Thumbnails
How to set System Reserved size on clean install.-panais.png  
My System SpecsSystem Spec
20 Feb 2012   #3
Microsoft MVP


In order to create your own SysReserved partition, prepartition using Partition Wizard and mark the SysReserved partition you create Active. Then direct install to C partition you've also created.

You'd also prepartition to avoid the SysReserved partition.
My System SpecsSystem Spec

20 Feb 2012   #4
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8

I would predefine an active, primary partition for C and install into that. Then you get no system reserved partition.

Another option is to move the bootmgr from the system reserved to C after the installation. Then you can delete the system reserved. Bootmgr - Move to C:\ with EasyBCD
My System SpecsSystem Spec
20 Feb 2012   #5

Windows 7 Pro & Ultimate (64-Bit) Retail, Windows 8.1 Pro (64-Bit) Retail

Thanks for the quick replies everyone. :)

Just found this article too which is pretty easy to follow:

Custom Setting the "System Reserved" Partition Size

I want to make sure it's set to 300mb as I had problems making image backups before and I keep my winre.wim file on my System Reserved partition too.
My System SpecsSystem Spec
20 Feb 2012   #6

Windows 7 Pro x64 Windows 10 Pro x64

I agree with WHS, make 1 partition with Partition Wizard Bootable and set it active. You will have 1 partion C: and no system reserved will be created. Much easier for a system image in my opinion.
My System SpecsSystem Spec
20 Feb 2012   #7

Windows 7 Pro & Ultimate (64-Bit) Retail, Windows 8.1 Pro (64-Bit) Retail

Hi AddRAM, I prefer to keep my system reserved partition to be honest. As I like the option of being able to reboot into WinRE from the drive instead of fishing through my DVD's. Plus I don't have a dual boot pc either and I don't use Bitlocker so it doesn't really cause me any issues. :)
My System SpecsSystem Spec
20 Feb 2012   #8

Windows 7 Pro x64 SP1

FWIW: I prepare several machines for a non-profit prior to installation of windows 7 Pro. I attache the hard disks to another machine via a usb-sata connector cable. I then partition the drive (most are 160gigs) as a single hard disk. I create a primary partition and format the drive. Then when I disconnect it and put it in the new machine. I boot the windows 7 dvd and install windows 7 with a minimum of aggrivation. It does not create the 100meg partition and seems to work fine.
Your mileage may vary

My System SpecsSystem Spec
20 Feb 2012   #9
Microsoft MVP


Hi Rich - It's easier to use free Partition Wizard bootable CD.

Burdus, you get WinRE on F8 with or without SysReserved but there's nothing wrong with having it and obviously MS feels it's important or they wouldn't have gone to the trouble. I see no downside and can takeit or leave it on any given install.
My System SpecsSystem Spec
22 Feb 2012   #10

Microsoft Community Contributor Award Recipient


For Dell, How to use Dell Recovery Partition,make Recovery Disks & how to order Recovery Disks.
Dell - Support

information   Information
We always assume you have made your Recovery Disks using the OEM manufacturer's Recovery Media Creator app the first day you had your new PC.
& made the Startup Repair CD.
startup repair disc-create

Did you make the OEM manufacturer's Recovery Disks?
My System SpecsSystem Spec

 How to set System Reserved size on clean install.

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