To disable reserved storage for Windows updates, follow these steps:
1. Press the Windows key + R to open the Run dialog box.
2. Type "regedit" and press Enter to open the Registry Editor.
3. Navigate to the following registry key:
```
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ReserveManager
```
4. Look for a DWORD value named "ShippedWithReserves" in the right pane.
5. Double-click on "ShippedWithReserves" and change its value data to 0.
6. Click OK and close the Registry Editor.
7. Restart your computer to apply the changes.
Keep in mind that modifying the registry can potentially cause system instability if not done correctly, so proceed with caution and consider creating a backup of your registry before making any changes.