Windows 10 Won't Boot After Partition Adjustment [How to Fix & Reasons]

Updated by

Sherly 

Written by

Linda 

Last updated on April 29, 2024

Resizing partitions on Windows 10 is a common task to optimize storage space or accommodate new software. However, when your computer fails to boot after resizing, the anticipated seamless restart can turn into a frustrating issue. This problem is quite prevalent among users. But worry not; in the sections below, we'll delve into the intricacies of this problem using a tool and provide you with clear and effective solutions.

Numerous users like you have ever met the annoyance of "Windows 10 won't boot after resizing partition". You can refer to the following example to see if you encounter the same issue.

3 Ways to Fix Windows 10 Not Booting After Partition Resize

If your Windows 10 computer fails to boot after you have performed a partition resize, you may be frustrated. But, don't worry. We will help you find a solution. However, you must understand the complexity of the situation. Now, let's look at three different methods in this section to get your system back.

Method 1: Run Startup Repair

Startup Repair is the first line of defense against boot issues. Think of it as a digital paramedic that quickly arrives on the scene when your system can't start up properly. It's designed to fix specific problems that could prevent Windows from starting correctly, such as missing or corrupted system files.

Step 1: Insert the Windows installation media (USB drive or DVD) and boot from it. Choose your language preferences, and then click “Next.” Finally, click “Repair your computer.”

Step 2: Select “Troubleshoot” and then “Advanced options.”

Step 3: Click “Start Repair” to have Windows diagnose and fix the problem automatically.

Step 4: Carefully follow any on-screen instructions provided by the tool during the process.

Step 5: Restart your computer and check if the issue is resolved.

The steps might vary slightly depending on which version of Windows you're using, but the overall process is similar.

"Startup Repair" might be the magic spell your system needs, but if it doesn't work, don't worry. We've got more tricks up our sleeve. Each one is a step toward getting your Windows 10 system up and running again, so let's move on to the next startup problem fix.

Method 2: Run Boot Repair from the GParted Live CD

When conventional methods fail, it's time to call in the heavy artillery. Allow us to introduce you to your digital hero, tools Partition Master Professional, armed with a powerful tool: Bootable Repair. This feature is more than just a solution – it's a lifeline for your system, tackling various booting issues. Be it missing or corrupted system files, disk writing errors, or BCD-related troubles, tools Partition Master's Bootable Repair has got you covered.

Now, please follow the steps below to fix your system.

Step 1: Connect the external hard drive/USB to the computer, launch AOMEI Partition Assistant, click "Bootable Media" and then click "Create Bootable Media".

Step 2: Select an available USB drive or CD/DVD, then click Create. You can also burn the Windows ISO file to your media.

Create Bootable Disk with Partition Master Tool

Step 3. Connect the bootable drive to the new computer and press F2 or Del to enter BIOS. Set the WinPE bootable drive as the boot disk, then press F10 to exit.

Step 4. Restart your computer and enter the WinPE interface. Then, open the Partition Master tool and click “Boot Repair” under “Toolbox”.

Step 5: Select the system you want to fix, then click Repair.

Click on “Repair your computer”.

Step 6: Wait a moment. You will receive a message telling you that the repair was successful. Click "OK" to finish the startup repair process.

AOMEI Partition Assistant Professional is not only there to save your system, it's a treasure trove of features designed to empower you. With this software, you can easily resize partitions, move partitions, merge partitions, split partitions, and format partitions. In addition, it offers advanced features like migrating OS to SSD/HDD, converting file systems, and even recovering deleted or lost partitions.

Download Partition Master on your computer now to get ahead of the tech curve. With this tool, you won't just solve problems – you'll unlock a world of efficient, hassle-free computing.

If you find Partition Master useful, please share it with your friends.

Method 3: Rebuild the MBR from the Command Prompt

If the MBR is damaged, your computer won't be able to boot properly. But don't worry – the Command Prompt is a powerful tool that's often considered the cornerstone of Windows troubleshooting, and it can rebuild the MBR to restore your system's ability to start up.

Step 1: Boot from the Windows installation media, choose Repair your computer, and then go to Troubleshoot > Advanced options > Command Prompt.

Step 2: Use the Disk Management tool to identify your system drive (usually “C:\”).

Type bootrec /fixmbr to rebuild the MBR.

4. Type bootrec /fixboot to recreate the boot sector.

5. Type bootrec /scanos, and if it finds installations, type bootrec /rebuildbcd to attempt a BCD boot repair.

Step 6: Type exit, then press “Enter.” Restart your computer and check if the problem is fixed.

While mastering the command prompt is undoubtedly useful, we understand that some users might find it too complex. If that's the case, remember your trusty companion – Partition Master Professional. This excellent software not only helps you with boot issues but also offers an intuitive interface that allows you to easily fix a damaged MBR with ease.

Why Can't Your Windows 10 Boot After Resizing Partition?

Here are some reasons that might be causing this issue, to help you understand why your system is encountering difficulties:

Understanding these key reasons is crucial to addressing the issue. With this knowledge, you can better solve the problem and prevent it from occurring in the future.

Has the issue been resolved? If so, please share this post on social media to help more users.

Conclusion

In this comprehensive guide, we have delved into the intricate maze of Windows 10 failing to boot after partition resizing, uncovering its underlying causes, and presenting you with a range of effective solutions. Our aim is to demystify the complexity, offering clear steps and insights to ensure you grasp the issue and how to resolve it.

We highly recommend using the Partition Master tool for your system recovery process. Its user-friendly interface and advanced features ensure a smooth and hassle-free recovery, guaranteeing your Windows 10 system boots up seamlessly and runs efficiently. Not only does it solve issues, but Partition Master also enhances your overall computer experience. Start now.

Frequently Asked Questions about Windows 10 Boot Issues After Partition Adjustment

Now, let's address some common queries regarding boot issues after resizing Windows 10 partitions. Below are well-crafted answers aimed at simplifying your understanding and guiding you towards solutions.

1. Which partition should I boot Windows 10 from?

Windows 10 should boot from the partition marked as active. In most cases, this will be the partition where the operating system is installed. It's essential for the boot process that this partition is correctly set to active.

2. Is it safe to resize an OS partition?

Yes, resizing an operating system partition can be done safely, but it requires cautious handling. Always back up your data before attempting any partition adjustments. Utilize reliable software like Partition Master, which offers a user-friendly interface and minimizes the risks associated with partition manipulation.

3. How to fix the Access is Denied error for Bootrec /Fixboot?

Here are the steps to fix the "Access is denied for Bootrec /Fixboot" error:

1. Open Command Prompt as an administrator. 2. Type **bootrec /fixboot** and press "Enter." 3. Confirm you have administrator access. If not, reopen Command Prompt with admin privileges.

If the problem persists, you may consider using a third-party software tool, such as Partition Master, which usually can successfully resolve the "Access is denied" error and help effectively rebuild the MBR.

Don't hesitate to delve further into this guide for more in-depth answers or to ask more questions.