How to Remove the 100MB "System Reserved" Partition in Windows 7
InformationThe 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.
WarningThis involves deleting the boot partition, then repairing. Failure to follow these instructions exactly may leave your computer in a non-bootable state.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
Here's How:
NotePress enter between each of these commands.
1. Boot from your installation or repair disc.That should do it! If you have any problems, feel free to ask for help below.
2. When you get to the language screen, press Shift+F10.
3. Enter diskpart, then list disk after diskpart is loaded.
4. Enter select disk [Windows disk number].
5. Enter list partition, followed by select partition [100MB partition number].
6. Enter delete partition override.
7. Enter select partition [Windows partition from step 5], then enter active.
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.