Windows 10 Stuck on Diagnosing Your PC? Full Fix Guide

The “Diagnosing your PC” screen appears when Windows detects a startup problem and attempts to repair it automatically.

However, if the repair process fails repeatedly, your computer may become stuck in an automatic repair loop, preventing Windows from loading normally.

So, why does this problem occur, and how can it be fixed?

This article analyzes common causes and introduces several proven solutions to help you restore normal Windows startup.

Why Windows 10 Gets Stuck on Diagnosing Your PC

Windows may get stuck on the “Diagnosing your PC” screen for several reasons, ranging from corrupted system files to disk-related issues.

The table below summarizes the most common causes.

Now that you know the possible causes, it’s time to troubleshoot the problem. Start with the simpler solutions first, and then move on to more advanced methods if the issue persists.

10 Proven Ways to Fix the Diagnosing Your PC Stuck Issue

In most cases, the “Diagnosing your PC” issue can be fixed without reinstalling Windows. Try the following methods one by one, and stop once your computer boots successfully.

# 1. Force Reboot Your PC

The first and simplest solution is to hard reboot your PC if Windows 10 diagnosing your PC stuck on the screen. This operation has been proven by many people to be useful. For that:

Step 1. Unplug the power supply from your computer and remove the battery.

Step 2. Wait for several minutes to clear all temporary cache. Then re-plug the power supply and reinstall the battery.

Step 3. Press and hold the Power button until the computer turns on. Once powered on, check if the Windows 10 diagnosing your PC error persists.

# 2. Boot into Safe Mode

Sometimes the “Windows 10 diagnosing your PC” error can be caused by incompatible or outdated device drivers. In this case, we recommend you boot the computer into Safe Mode.

Step 1. Click the Start icon at the bottom left corner press the Power icon, and then click the Restart button with the Shift key pressed.

Step 2. Now, your computer will boot into the Windows Recovery Environment menu. Once here, click on Troubleshoot > Advanced options.

Step 3. In the Advanced options menu, select Startup Settings. Then you will see 3 options to enter Safe Mode. Just press F4, F5, or F6 based on your needs. If the error persists in Safe Mode, just move down to other solutions.

# 3. Run Disk Cleanup

If there is not enough space on the system partition, you may encounter the Windows 11 diagnosing your PC error. To free up disk space, you can run Disk Cleanup in Safe Mode.

Step 1. Boot into Safe Mode as we just explained above. Then press the Win + R keys to open the Run dialog box, type cleanmgr, and press Enter to open Disk Cleanup.

Step 2. Select the C drive from the drop-down menu and click on OK.

Step 3. Click Clean up Systems files in the Disk Cleanup window to scan more files.

Step 4. Wait for the scan to complete. Select the files that you want to delete and click on OK. Then click on Delete Files to further confirm the cleanup.

Once finished, restart your PC and see if the Windows 11 diagnosing your PC error disappears.

# 4. Extend the System Partition

In some cases, Windows gets stuck on “Diagnosing your PC” because the system partition does not have enough free space to complete startup repair.

When the system partition is nearly full, Windows may fail to load critical repair files, resulting in a boot loop. It is recommended that you extend the system partition to fix the issue.

Instead of reinstalling Windows, you can extend the system partition using a reliable disk management tool.

One effective solution is using MiniTool Partition Wizard, which allows you to safely extend the system partition without data loss.

Here are the full steps:

MiniTool Partition Wizard DemoClick to Download100%Clean & Safe

Step 1. Plug the prepared USB into a working computer or insert a USB drive or CD/DVD.

Step 2. Launch the MiniTool software to access its main interface. Click Bootable Media in the upper right corner and follow the on-screen instructions to create a bootable USB drive.

Step 3. Insert the bootable USB into the original computer, restart your computer, and press F2 or Delete keys to enter BIOS, change boot order, and make your computer boot from the USB drive.

Step 4. In the main interface of MiniTool Partition Wizard, select the system partition from the disk map and click on Extend Partition from the left pane.

Step 5.  Select unallocated space or a partition from the drop-down menu, drag the sliding bar to occupy the space, and click on OK. Then Click on Apply to execute the process

Once the system partition has been successfully extended, restart your PC and check whether Windows can boot normally. If the problem persists, proceed to the next solution below.

# 5. Repair Your Computer

If the previous methods don’t work, you can use Windows installation media to repair your computer. This can help resolve startup issues that prevent Windows from booting normally.

Step 1. Insert the Windows installation disc into your computer and restart it from the disc. Then press any key to boot from the media.

Step 2. Choose the language preference and go on until you arrive at the Install Now screen. Then click on Repair Your Computer to access the Advanced Settings menu.

Step 3. Select Troubleshoot and access Advanced Options, and click Startup Repair in order. Then it will automatically repair your system. Wait for the repair to finish and reboot your computer to see if diagnosing your PC Windows 10 error is gone.

Windows will automatically scan for and repair startup issues. Once the process is complete, restart your computer and check whether the “Diagnosing your PC” issue has been resolved.

# 6. Repair the System Files

Corrupted or missing system files can also cause the “stuck on diagnosing your PC” error. In this case, running an SFC scan or DISM tool in Windows Recovery Environment can help repair the system files.

Step 1. Follow Step 1 to Step 4 in Solution 5 to access the Advanced options menu and select Command Prompt.

Step 2. In the Command Prompt window, type the sfc /scannow command and hit Enter to repair system files automatically. This process may take you some time to complete. So, please wait patiently.

Step 3. After the scan is complete, restart your computer and re-follow the same steps to come back to the elevated Command Prompt window. Once opened, type the following commands in order and press Enter after each one.

• Dism /Online /Cleanup-Image /CheckHealth
• Dism /Online /Cleanup-Image /ScanHealth
• Dism /Online /Cleanup-Image /RestoreHealth

# 7. Uninstall the Recently Installed Updates

Recent Windows updates or feature updates may sometimes cause the diagnosing your PC stuck error. If the issue started after an update, uninstalling it may help restore normal startup.

Step 1. Enter WinRE as we explained above and access the Advanced options menu, then select Uninstall Updates.

Step 2. In the Uninstall Updates window, select Uninstall latest feature update, and enter your admin password when prompted. Then wait until your PC finishes the uninstallation and reboot to see if the diagnosing your PC Windows 10 error gets solved.

# 8. Perform a System Restore

System Restore can be a useful option when Windows is still stuck on the “Diagnosing your PC” screen after trying other fixes.

By loading a previous restore point, Windows can return to a stable state where the issue did not exist. You can start the process from WinRE by following the steps below.

Step 1. Enter WinRE as we explained above and access the Advanced options menu as we showed above, then select System Restore.

Step 2. The System Restores window will pop up immediately, and click Next to continue.

Step 3. In the list of all system restore points, select the Restore point that you prefer and click the Next button. Here you can tick the checkbox next to Show more restore points.

Step 4. Then confirm your restore point by clicking the Finish button. After that, your computer should be restored to an earlier state, and the Windows 10 diagnosing your PC stuck error gets solved.

# 9. Rebuild BCD

Boot Configuration Data (BCD) is an essential Windows component that controls how the operating system starts.

If it becomes corrupted, Windows 11 diagnosing your PC error may occur. Or fail to boot properly. In this case, rebuilding the BCD can help resolve the issue.

If relevant files are corrupted, a Windows 11 diagnosing your PC error may occur, or the system may fail to boot properly. In such cases, rebuilding the BCD can help resolve the issue.

Step 1. Enter WinRE using your Windows installation disc and select Command Prompt in the Advanced options menu.

Step 2. In the elevated Command Prompt window, type the following commands in order and hit Enter after each one.

• bootrec /fixmbr
• bootrec /fixboot
• bootrec /scanos
• bootrec /rebuildbcd

Step 3. When the repair is complete, type exit and press Enter. Then restart your computer and check if the Windows diagnosing your PC error is gone.

# 10. Clean Install Windows 10/11

If none of the above methods can get rid of the “Windows 10/11 stuck on diagnosing your PC” error, you may consider performing a clean installation of Windows 10/11. This method will reset your PC to its factory settings and delete everything on the hard disk, which can help clean the error. Before you do, make sure you have backed up all important data on your computer.

After that, you can refer to the following guides to know more details:

How to Clean Install Windows 11? Here Are 5 Options

How to Reinstall Windows 10 without CD/USB Easily (3 Skills)

It’s so vexing that my laptop was always stuck on diagnosing your PC when starting. Fortunately, this post helped me get rid of the error. It provides 10 effective troubleshooting methods.Click to Tweet

Windows 10 Diagnosing Your PC Error FAQ

What’s Your Opinion

In most cases, the “Diagnosing your PC” issue can be resolved with the troubleshooting methods above without reinstalling Windows. The problem is usually related to system files, updates, or disk and partition issues.

If Windows still fails to boot normally after trying all the solutions, it may indicate a more serious system or hardware problem that requires further diagnosis or system recovery.

Besides, you can contact us via [email protected] if you have any confusion or feedback about MiniTool Partition Wizard.