How to Disable Reserved Storage on Windows 11 Without Breaking Updates

Quick fix: Open Registry Editor (Admin). Navigate to HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ReserveManager. Set ShippedWithReserves to 0. Reboot. Reserved Storage disables; ~7GB+ freed. Updates still install but may temporarily use C: drive space during installation instead of reserved.

Reserved Storage allocates ~7GB on Windows 11 specifically for updates, system cache, temporary files. Reduces disk space needed for updates by reserving in advance. On small SSDs, disable to reclaim space.

What causes this

Reserved Storage was added in Windows 10 1903+. It pre-allocates ~7GB on C: drive. Purpose: ensure space for updates, app installs, temporary files. On 64GB-128GB SSD systems, that’s significant. Disabling reclaims space; trade-off is occasional update issues if C: is critically low.

Method 1: Disable via Registry

The standard route.

1. Open Registry Editor as Admin.
2. Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ReserveManager.
3. Find DWORD: ShippedWithReserves. Default: 1.
4. Right-click → Modify. Change Value Data to 0.
5. OK.
6. Find DWORD: BaseHardReserveSize. May exist.
7. Right-click each → Modify if needed.
8. Close Registry Editor.
9. Reboot.
10. After reboot: Reserved Storage disabled. Disk space freed.
11. Verify: Settings → System → Storage. Look at System & reserved — should decrease.

This is the standard fix.

Method 2: Use DISM to disable

For command-line approach.

1. Open Command Prompt as Admin.
2. Disable Reserved Storage:

   DISM.exe /Online /Set-ReservedStorageState /State:Disabled

3. To re-enable later: DISM.exe /Online /Set-ReservedStorageState /State:Enabled.
4. Check current state: DISM.exe /Online /Get-ReservedStorageState. Returns Disabled / Enabled.
5. Reboot.
6. For confirming actual free space: fsutil volume querycluster C: 0 — check cluster info.
7. Disk space freed becomes available for normal use.
8. Future updates: still install but may need temporary space; Windows handles.

This is the DISM route.

Method 3: Use Storage Settings

For GUI users.

1. Open Settings → System → Storage → Advanced storage settings → Storage Sense.
2. This doesn’t directly disable Reserved Storage, but configures cleanup.
3. For viewing what reserved storage holds: Storage → System & reserved → click for breakdown.
4. Shows: Windows, Reserved storage, Virtual memory, Hibernation file, System restore.
5. To reduce specific items:
   • Hibernation: disable via powercfg /hibernate off.
   • Virtual memory: configure custom size in System Properties.
   • System Restore: reduce allocation in System Protection.
6. Reserved Storage itself: only registry / DISM disables.
7. Combined cleanup with Reserved disable can free 15-25GB on small drives.

This is the holistic approach.

How to verify the fix worked

• Settings → System → Storage → System & reserved shows less space used.
• DISM.exe /Online /Get-ReservedStorageState returns Disabled.
• C: drive free space increased ~7GB+.
• Registry value ShippedWithReserves = 0.

If none of these work

If disabled doesn’t free space immediately: Reserved space gets reclaimed gradually: as Windows clears caches and uses space. Wait 24 hours. Cumulative update reverts: Microsoft may re-enable. Re-disable after major updates. For updates failing due to low space: re-enable reserved storage temporarily for big updates: DISM.exe /Online /Set-ReservedStorageState /State:Enabled. Then disable after. For chronic disk pressure: consider bigger SSD. 256GB minimum recommended for Win11. For Surface devices: tight on space. Reserved disable may help marginally. For Group Policy enforcing: corporate-managed PCs may have policy. Check. For dual-boot setups: shared partition complicates Reserved Storage management. Last resort: clean install: fresh Win11 install lets you skip Reserved during setup (older option may be removed in newer Win11).

Bottom line: DISM.exe /Online /Set-ReservedStorageState /State:Disabled in Admin cmd. Or registry: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ReserveManager\ShippedWithReserves = 0. Reboot. ~7GB freed. Updates still install but may use C: drive space.