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Hide System Reserved Partition in Windows

Updated · Standard formula, shown below

This guide shows you how to hide the System Reserved partition in Windows so it no longer appears in File Explorer or Disk Management. You’ll need administrative access to your PC, and you should back up any important data before making changes to disk partitions.

What You’ll Need

  • A Windows PC (Windows 7, 8, 10, or 11)
  • Administrator account access
  • Disk Management tool (built-in) or Command Prompt
  • Backup of important files (recommended)

Step-by-Step

  1. Open Disk Management. Press Win + X and select Disk Management from the menu. Alternatively, type diskmgmt.msc in the Run dialog (Win + R).
  2. Identify the System Reserved partition. Look for a partition labeled System Reserved, usually 100–500 MB, with no drive letter. If it has a letter (like E:), you’ll need to remove it.
  3. Remove the drive letter. Right-click the System Reserved partition and select Change Drive Letter and Paths. Select the drive letter and click Remove. Confirm any warnings about programs using the drive letter. This hides it from File Explorer.
  4. If the partition has no drive letter but still shows: It might appear in Disk Management as a healthy partition. To hide it from Disk Management, you’ll need to use Diskpart or a third-party tool, but note that Disk Management always shows all partitions—it doesn’t hide them. If you want to remove it from Disk Management, you’d need to delete it, which is not recommended.
  5. Alternative: Use Diskpart (Command Prompt). Open Command Prompt as Administrator. Type diskpart and press Enter. Then type list disk to see your disks. Select the disk with select disk 0 (replace 0 with your disk number). Type list partition to see partitions. Find the System Reserved partition number (usually partition 1). Type select partition 1 (replace 1). Then type remove letter=E (replace E with the actual letter) to remove the drive letter.
  6. Verify the change. Open File Explorer and confirm the System Reserved partition no longer appears in This PC. It will still be visible in Disk Management, but that’s normal.

Common Mistakes

  • Deleting the partition instead of removing the letter. Deleting System Reserved can make Windows unbootable. Always choose “Remove” not “Delete Volume”.
  • Removing the letter from the wrong partition. Double-check the partition size and label. System Reserved is typically 100–500 MB and has no file system label other than “System Reserved”.
  • Assuming Disk Management can hide partitions. Disk Management does not have a “hide” feature; it always shows all partitions. Only File Explorer can be made to hide a partition by removing its drive letter.
  • Forgetting to run as administrator. Diskpart and some Disk Management actions require admin rights. If you get an error, close and reopen with admin privileges.

Tips

  • Before making any changes, create a system restore point or backup your boot configuration. This ensures you can recover if something goes wrong.
  • If the System Reserved partition is on a different disk (e.g., a secondary drive), you can safely remove its drive letter without affecting the OS, but it’s still best to be cautious.
  • Use the built-in Disk Management tool for most cases; it’s simpler and less error-prone than Diskpart.
  • If you’re comfortable with advanced tools, you can use third-party partition managers that offer a “hide” option, but be aware that they may not be necessary.

Troubleshooting

  • “The parameter is incorrect” error when removing letter. This often happens if the partition is in use. Close all programs, especially those that might access the drive (like antivirus or backup software), then try again.
  • System Reserved partition still shows after removing letter. Check if it has multiple drive letters assigned. Go to Change Drive Letter and Paths and remove all letters. Also, check if it’s mounted in a folder—remove that as well.
  • Windows won’t boot after changes. If you accidentally deleted the partition, you’ll need to repair the boot loader. Boot from a Windows installation USB, select “Repair your computer”, then “Troubleshoot” > “Advanced options” > “Startup Repair”. If that fails, use Command Prompt to run bootrec /fixmbr, bootrec /fixboot, and bootrec /rebuildbcd.
  • Diskpart says “The specified drive letter is not valid.” This means the partition doesn’t have that letter. Run detail partition to see the current letter, then remove it.

Frequently Asked Questions

Is it safe to hide the System Reserved partition?

Yes, removing its drive letter is safe. The partition remains intact and Windows still uses it for boot files. It just won’t be visible in File Explorer.

Why does the System Reserved partition exist?

It stores boot configuration files and recovery tools needed to start Windows. It’s created automatically during installation and is essential for the OS to boot.

Can I delete the System Reserved partition?

No, deleting it will likely make Windows unbootable. If you need to reclaim space, you’d have to reinstall Windows or move the boot files, which is complex and not recommended.

Will hiding it affect Windows updates?

No, updates don’t require the partition to have a drive letter. The system accesses it internally regardless.

How do I unhide it if I change my mind?

Open Disk Management, right-click the System Reserved partition, choose “Change Drive Letter and Paths”, click “Add”, and assign a letter. It will reappear in File Explorer.

Why does Disk Management still show it after hiding?

Disk Management is a system tool that displays all physical partitions. Hiding only affects File Explorer and other user-mode apps, not system management tools.

Related

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.