Software⏱️ 3 min read📅 2026-06-11

How to Fix: Shrink volume - Error: parameter incorrect - Window 10

Fix Shrink volume error in Windows 10 with incorrect parameter, partition disk management issues.

Quick Answer: To fix the issue, disable Fast Startup and then try shrinking the C drive again.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. ✅ Best Solutions to Fix It
  3. 🎯 Final Words

The 'parameter incorrect' error occurs when you attempt to shrink a volume in Windows 10, but the system is unable to determine the correct parameters for the operation. This issue affects users who are trying to split their C drive into two partitions using the built-in Disk Management tool. The error can be frustrating as it prevents users from achieving their desired disk layout.

Shrinking a volume in Windows 10 requires careful consideration of the available space and the target partition's size. In this case, the issue may be caused by the presence of a healthy recovery partition (Disk #3) located after the C drive. This can cause confusion for the system, leading to the 'parameter incorrect' error.

🛑 Root Causes of the Error

  • The primary reason for the 'parameter incorrect' error is that the system cannot determine the correct parameters for shrinking the volume due to the presence of other partitions. In this case, the healthy recovery partition (Disk #3) may be causing confusion for the system.
  • An alternative reason could be that the available space on the C drive is not sufficient to perform the shrink operation successfully.

✅ Best Solutions to Fix It

Shrinking Volume by Removing the Healthy Recovery Partition

  1. Step 1: First, open the Disk Management tool and locate the healthy recovery partition (Disk #3). Right-click on this partition and select 'Delete Volume'. Confirm that you want to delete the volume.
  2. Step 2: Next, open the Disk Management tool again and locate the C drive. Right-click on the C drive and select 'Shrink Volume'. Enter the desired size for the new partition and click 'OK'.
  3. Step 3: Finally, verify that the shrink operation was successful by checking the disk layout in the Disk Management tool.

Shrinking Volume by Using a Third-Party Tool

  1. Step 1: First, download and install a third-party partition manager software (such as Acronis Disk Director or EaseUS Partition Master).
  2. Step 2: Next, open the software and locate the C drive. Select the 'Shrink' option and enter the desired size for the new partition.
  3. Step 3: Finally, verify that the shrink operation was successful by checking the disk layout in the Disk Management tool.

🎯 Final Words

To resolve the 'parameter incorrect' error when trying to shrink a volume in Windows 10, you can try removing the healthy recovery partition or using a third-party partition manager software. By following these steps, you should be able to successfully split your C drive into two partitions.

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