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Installing Windows 11 can sometimes run into errors, and one common issue is the “Cannot install Windows 11 on dynamic partition” error. This happens because Windows 11 requires a basic disk partition to install properly. Dynamic disks are used for advanced storage features but are not supported by the Windows setup process.

If you encounter this error, don’t worry. There are simple ways to fix it, and this guide will walk you through each step clearly. You don’t need to be a tech expert to follow along.

We will start with basic checks and progress towards more advanced solutions if needed. Take your time with each step to ensure your installation goes smoothly.

Let’s get started with some quick notes before fixing the issue.

Quick Note: Prerequisites and Checks

• Backup your data: Converting or changing disk types can cause data loss. Always back up important files before proceeding.
• Check disk type: Confirm if your disk is dynamic by opening Disk Management (press Win + X and select Disk Management). Dynamic disks will be labeled as “Dynamic” under the disk description.
• Windows 11 requirements: Ensure your system meets all Windows 11 hardware requirements aside from the disk issue.

Step 1: Confirm Your Disk Type

Before fixing, you need to be sure your disk is dynamic. Follow these steps:

1. Press Win + X and select Disk Management.
2. Look at the disks listed at the bottom. You will see descriptions like “Basic” or “Dynamic” next to each disk number.
3. If your disk says “Dynamic,” this is why the Windows 11 installation fails.

This check is important because Windows 11 cannot be installed on dynamic disks due to how the operating system manages partitions and boot records.

Step 2: Convert Dynamic Disk to Basic Disk Using Disk Management

This is the most straightforward method but requires you to delete all volumes on the dynamic disk first. This means all data will be erased, so backup is mandatory.

1. Open Disk Management again.
2. Right-click each volume on the dynamic disk and select Delete Volume. Confirm any warnings.
3. Once all volumes are deleted, right-click the dynamic disk and choose Convert to Basic Disk.
4. After conversion, you can create a new partition and format it for Windows 11 installation.

This step is necessary because Windows only installs on basic disks, which have a simpler partition structure compatible with most operating systems.

Step 3: Use Command Prompt to Convert Without Data Loss (Advanced)

If you want to avoid deleting data, this method uses a tool called diskpart. However, this method is risky and not always guaranteed to work.

1. Boot from Windows 11 installation media (USB or DVD).
2. At the setup screen, press Shift + F10 to open Command Prompt.
3. Type diskpart and press Enter.
4. Type list disk and press Enter to see all disks.
5. Identify your dynamic disk by its size.
6. Type select disk X (replace X with your disk number) and press Enter.
7. Type detail disk to confirm it’s dynamic.
8. Unfortunately, diskpart does not support converting dynamic to basic without data loss, so you might need third-party software for this step.

Because diskpart cannot convert the disk without wiping data, consider third-party tools like EaseUS Partition Master or AOMEI Partition Assistant. These tools can convert dynamic disks back to basic without deleting data.

Step 4: Use Third-Party Software to Convert Dynamic Disk to Basic

If you want to keep your data intact, third-party software is your best option. Here’s a general overview of how to use such tools:

• Download and install a trusted partition manager (e.g., EaseUS Partition Master, AOMEI Partition Assistant).
• Open the software and locate your dynamic disk.
• Look for an option like “Convert Dynamic Disk to Basic Disk.”
• Follow the on-screen instructions carefully. The software will handle the conversion without deleting data.
• After conversion, restart your PC and proceed with Windows 11 installation.

Always use reputable software and read reviews before downloading. These tools simplify the process and reduce risks of data loss.

Step 5: Clean Install Windows 11 After Conversion

Once your disk is converted to basic, you can continue installing Windows 11:

1. Restart your PC and boot from your Windows 11 installation USB or DVD.
2. Follow the installation prompts until you reach the disk selection screen.
3. Choose the basic disk and create a new partition if needed.
4. Continue with the installation as normal.

This step ensures Windows installs on a supported disk structure, avoiding the dynamic partition error.

Frequently Asked Questions (FAQs)

Why does Windows 11 not install on dynamic disks?

Windows 11 requires a basic disk because dynamic disks use a different partitioning method that Windows setup does not support for boot or system partitions.

Can I convert dynamic disk to basic without losing data?

Yes, but only with reliable third-party software. Windows built-in tools require deleting volumes first, which erases data.

Is it safe to use third-party software for disk conversion?

Generally yes, if you use well-known and trusted software. Always back up your data before making changes to your disk.

What if I still get the error after converting to basic disk?

Check if your disk partition style is GPT, as Windows 11 requires GPT for UEFI boot. Also, verify all other Windows 11 system requirements.

How do I check if my disk uses GPT or MBR?

In Disk Management, right-click on the disk number and select Properties. Go to the Volumes tab and check the partition style.

When Nothing Works

If you have tried all the above steps and still cannot install Windows 11, consider the following:

• Use the official Microsoft Windows 11 Installation Help page for troubleshooting guides.
• Consult a professional technician to check your hardware and disk configuration.
• Consider replacing the hard drive if it has compatibility issues or is malfunctioning.

Conclusion

The “Cannot install Windows 11 on dynamic partition” error is a common hurdle but can be fixed by converting your disk from dynamic to basic. Always start by confirming your disk type and backing up data. The easiest method is deleting volumes and converting through Disk Management, but if you want to preserve data, third-party tools are the way to go.

Following the steps carefully will help you prepare your system for a smooth Windows 11 installation. Remember to verify other Windows 11 requirements and use official resources if needed.

With patience and the right tools, you’ll overcome this error and enjoy the new features Windows 11 has to offer.