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Windows 7: System Reserved Partition - Delete


System Reserved Partition - Delete

How to Delete the 100MB "System Reserved" Partition in Windows 7
Published by Jonathan_King
16 Mar 2010
Published by

How to Remove the 100MB "System Reserved" Partition in Windows 7



information   Information
The 100 MB System Reserved partition is included when doing a clean install of Windows 7 on an unallocated disk. The System Reserved partition serves two functions. First, it holds the Boot Manager code and the Boot Configuration Database. Second, it reserves space for the startup files required by the BitLocker Drive Encryption feature. If you ever decide to encrypt your system drive using BitLocker, you won’t have to repartition your system drive to make it possible.

This tutorial will show you how to delete the 100MB System Reserved partition created during the installation of Windows 7.


warning   Warning
This involves deleting the boot partition, then repairing. Failure to follow these instructions exactly may leave your computer in a non-bootable state.
Note   Note
  • Make sure the C drive is a Primary partition before you begin. Type diskmgmt.msc into the start menu to access the above window.
  • You must have a Windows 7 Installation or Repair disc to do this. If you do not have a DVD, you can create a Repair Disc.

EXAMPLE: 100 MB System Reserved Partition
System Reserved Partition - Delete-capture.png
Here's How:

Note   Note
Press enter between each of these commands.
1. Boot from your installation or repair disc.

2. When you get to the language screen, press Shift+F10.
System Reserved Partition - Delete-capture1.png
3. Enter diskpart, then list disk after diskpart is loaded.
System Reserved Partition - Delete-capture2.png
4. Enter select disk [Windows disk number].
System Reserved Partition - Delete-capture3.png
5. Enter list partition, followed by select partition [100MB partition number].
System Reserved Partition - Delete-capture4.png
6. Enter delete partition override.

7. Enter select partition [Windows partition from step 5], then enter active.
System Reserved Partition - Delete-capture5.png
8. Close the command prompt.
We have deleted the partition, and Windows will be unable to boot at this point. Now it is time to write a new boot loader and BCD to the Windows partition.
9. Follow the instructions in Brink's tutorial for running a startup repair.
That should do it! If you have any problems, feel free to ask for help below.








16 Mar 2010   #1
TheSchaft

Windows 7 x64 HP, Windows 7 HP, Windows 7 Ult
 
 

JK - Good stuff, but wouldn't "bootrec /FixMbr" as step 8 (7A?) write out a new boot record and eliminate the need for step 9?


My System SpecsSystem Spec
16 Mar 2010   #2
Jonathan_King

Windows 7 Professional x64
 
 

Possibly Schaft, but that wouldn't rebuild the BCD.

Of course, you could also run bootrec /rebuildbcd, but I trust startup repair more.

To be honest, I don't have very much experience with bootrec, so I tend to recommend the startup repair.
My System SpecsSystem Spec
16 Mar 2010   #3
TheSchaft

Windows 7 x64 HP, Windows 7 HP, Windows 7 Ult
 
 

Quote   Quote: Originally Posted by Jonathan_King View Post
Possibly Schaft, but that wouldn't rebuild the BCD.

Of course, you could also run bootrec /rebuildbcd, but I trust startup repair more.

To be honest, I don't have very much experience with bootrec, so I tend to recommend the startup repair.
I can't say that I have a lot of experience with bootrec either, but I found it the fastest way to get rid of GRUB's multiple boot menu when I wanted to unload Ubuntu - just rebuilt the MBR and then went in under Windows 7 and deleted the partitions.
My System SpecsSystem Spec
.


16 Mar 2010   #4
Night Hawk

Windows 7 Ultimate x64, W10 Preview - Second remote tower Windows 7 Pro x64
 
 

I found the 100mb of repair tools quite useful lately when the host drive's installation ran into a problem where Windows would stall at the logo screen. The automatic startup repair tool came to life on it's own plus the option to restore a system image created.

Note when originally partitioning the drive using GParted the separate 100mb section was never created. Instead the repair tools were somehow packed into the solid C primary. When partitioning the drive using the Windows drive tools during the installation however you see the 100mb section created.

Apparently using a 3rd party partitioning program is another option if you do not want the 100mb section created from the start. The image here shows hows the host drive looks in the DM without the 100mb being seen. Having the repair tools already on the drive however can eliminate the need for the 7 dvd when a problem comes up. Just something to pass along here.


Attached Images
System Reserved Partition - Delete-host-hd-no-100mb.jpg 
My System SpecsSystem Spec
16 Mar 2010   #5
Jonathan_King

Windows 7 Professional x64
 
 

Apparently the 100MB partition is created when setup does not find any active partitions.
My System SpecsSystem Spec
16 Mar 2010   #6
Night Hawk

Windows 7 Ultimate x64, W10 Preview - Second remote tower Windows 7 Pro x64
 
 

When you are first installing 7 on a new drive or one previously wiped no longer seeing a primary you would be using the MS drive tools options found on the dvd there. You will also note the 1-8mb of unallocated drive space for changing between the Basic type of volume used mainly on desktops or the Dynamic for server geared.

The MS drive tools also prepare the 100mb reserved as part of the installation for 7 to include the repair tools. When the drive is already seeing an active primary as you are pointing to the installer still places the repair tools tucked away at the beginning of the existing primary eliminating the need for the separate 100mb section.

I had initially been wondering if the repair tools wouldn't be available until seeing the startup repair come up while trying to debug a sudden hardware or lack of hardware detection problem. Suddenly no internet, no tuner card available, and the sound went out?

When interrupting a restore point the startup repair tool suddenly stepped in showing that the Windows installer still sucessfully placed them on the drive without the need for the 100mb taken away. The concern when removing the 100mb section when not having a 7 dvd would be the need to burn a repair cd with 7 fortunately now seeing that option included!

The 3 cards were simply removed and reseated to suddenly hear ping, ping, ping "you must restart to see the changes put into effect"! when the system was started afterwards. Windows 7 again solved it's own dilemna with the fresh detection as well as seeing the repair tools onhand having used a 3rd party drive tool.

For those who want to reclaim the 100mb of drive space be sure to burn a repair cd to have onhand since that can also save on handling the 7 dvd itself as well as for those not having one in the case of 7 being preinstalled. For those about to install 7 on a bare drive and want to avoid the 100mb being taken then the use of a 3rd party drive tool is something to consider as well.
My System SpecsSystem Spec
08 Nov 2010   #7
EzioAuditore

Winbdows 7 ultimate x64 | Ubuntu 12.04 x64 LTS
 
 

@Jk
After deletioin, it is seen as Unallocated space. How do I add this space to my system partition (C? Will Extend command under diskpart do the job?
Better yet, if u could provide the exact steps, would be nice. I dont wanna mess up with these things...
My System SpecsSystem Spec
08 Nov 2010   #8
Jonathan_King

Windows 7 Professional x64
 
 

Hello EzioAuditore,

You will need to extend your C partition to include that space. The Windows Disk Management tool cannot extend space to the left of the volume, so you'll need to use a third-party tool. I recommend Partition Wizard Free Edition: Magic Server Partition Manager Software - Resize partition for Windows Server 2003, 2008 and 2000.

Using Partition Wizard, right-click on the C partition, and select Move/resize. Then drag the edge of the box to the left, to include that unallocated space.

When you're done, be sure to select Apply actions.
My System SpecsSystem Spec
08 Nov 2010   #9
EzioAuditore

Winbdows 7 ultimate x64 | Ubuntu 12.04 x64 LTS
 
 

@JK
That's really a nice tool. But it's shareware and wont let me do my job until i register it.. Cant afford now. Any freeware alternative?
Thanks anyways.
My System SpecsSystem Spec
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 System Reserved Partition - Delete




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