How to Fix "Diagnosing Your PC" Error

Fojap - Encountering the message "Diagnosing Your PC" when starting up your computer can be quite frustrating. But what does "Diagnosing Your PC" actually mean? And how can you resolve it?

What is "Diagnosing Your PC"?

The message "Diagnosing Your PC" typically appears in Windows when the operating system encounters errors or issues during startup. This message is often followed by a process where Windows attempts to diagnose the problem and potentially applies automatic fixes to resolve it. This feature is part of Windows' built-in troubleshooting and repair tools.

The "Diagnosing Your PC" message may appear due to several reasons, including:

  1. Startup Issues: If Windows encounters problems during the boot process, such as corrupt file systems and registries, driver conflicts, or hardware issues, it will attempt to diagnose and fix these issues automatically.
  2. Blue Screen of Death (BSOD): When Windows experiences a critical error resulting in a BSOD, it will likely enter diagnostic mode to identify the cause of the crash and potentially offer solutions.
  3. System Updates: Windows updates can also trigger the appearance of the "Diagnosing Your PC" message. Windows may need to diagnose itself to ensure that updates are installed correctly and do not cause any issues.
  4. Hardware Problems: If Windows detects hardware problems during startup, such as issues with the hard drive or RAM, it will display the "Diagnosing Your PC" message and initiate diagnostics to identify and address the problem.
  5. Insufficient Storage: The "Diagnosing Your PC" message may also appear when you lack the necessary storage to run all the programs and services required to boot the operating system. Regularly using cleaner applications can help prevent this issue.

During the diagnostic process, Windows will display messages, progress indicators, and notifications about the steps needed to identify and fix the existing issues. The available steps and options may vary depending on the version of Windows you are using.

Unfortunately, this process often leads to new issues. The most common problem is users getting stuck with a black screen with just the Windows logo. Even after restarting, users find themselves back on the Diagnostic PC page.

If you're stuck with the "Diagnosing Your PC" problem, here are some methods to resolve it.

How to Fix "Diagnosing Your PC" Error

Hard Reboot

The first step to take when encountering the "Diagnosing Your PC" message is to perform a hard reboot. You can do this by pressing and holding the Power button for 4-5 seconds until the computer shuts down. Then, you can turn on your PC as usual.

If this method doesn't work, you can unplug the power cable from your PC to cut off the power supply completely. For laptop users, you can also remove the battery temporarily.

Afterward, wait for a while, reconnect the PC power cable or reinsert the laptop battery, then press the Power button again to turn on the PC/laptop.

Disconnect All Devices/Cables Attached to USB Ports

Another method claimed to be effective in fixing Windows booting problems is by unplugging all devices or cables attached to your USB ports. This can help with the "Diagnosing Your PC" issue, especially if it's caused by the following:

  1. Driver Conflicts: Sometimes, USB devices have incompatible or problematic drivers that cause startup issues. Disconnecting these devices can potentially resolve conflicts and allow Windows to boot without entering diagnostic mode.
  2. USB Device Failures: If one of the USB devices connected to the computer malfunctions or causes hardware conflicts, removing it can prevent Windows from encountering issues during startup.
  3. USB Boot Priority: In some cases, if the computer is set to boot from a USB device, connecting a bootable USB drive can cause startup problems. Disconnecting USB devices allows Windows to boot normally.

Boot into Safe Mode

Booting into Safe Mode can also help resolve issues when "Diagnosing Your PC."

In Safe Mode, Windows only loads essential system drivers and services, excluding third-party software and drivers. So if you can enter Safe Mode, it's likely that there's a conflict or problem with one of the third-party drivers or software you're using.

To address this, you can recall which software or driver you last updated. Then you can roll back or uninstall that driver/software and install a previous version.

To enter Safe Mode, you can follow these steps:

  1. Press the Power button to turn on your PC/laptop.
  2. When the computer starts up, press the F8 key repeatedly before the Windows logo appears to display the Advanced Boot Options menu. (Note: Some other computers may have a different key)
  3. In the Advanced Boot Options menu, select the "Safe Mode" option and press Enter. If you have additional options like "Safe Mode with Networking" or "Safe Mode with Command Prompt," you can also choose them according to your troubleshooting needs.
  4. After that, you just need to log in with your username and password (if prompted).

How to Fix "Diagnosing Your PC" Error

If you can enter Safe Mode, you can perform tasks such as updating drivers, removing problematic software installations, or running system diagnostics. If this doesn't work, you can try the next steps to address "Diagnosing Your PC."

Run System Restore Utility

The System Restore feature allows you to revert your computer's files and system settings to a previous state, known as a restore point, where your computer was functioning correctly.

If the "Diagnosing Your PC" issue is caused by recent software changes, driver updates, or system configuration issues, running the System Restore Utility can undo those changes and potentially resolve the problem.

To do this, you first need to create a previous restore point. Then, follow these steps:

Use the previous steps to boot into Safe Mode.

If you successfully boot into Windows, go to the Settings menu > System and look for the About option in the left panel.

Then scroll the right panel and find the System Protection option.

How to Fix "Diagnosing Your PC" Error

Click Next and select the restore point you created earlier.

Wait for the restoration process to complete.

How to Fix "Diagnosing Your PC" Error

Repair BCD

Another reason for encountering the Preparing Automatic Repair page when trying to boot into Windows is the missing or corrupted boot files. The failure of the Boot Configuration Data (BCD) is what causes Windows startup to malfunction, leading to the appearance of the "Diagnosing Your PC" page.

To fix this, you can use a Windows installation CD and follow these steps:

Insert the bootable Windows installation CD when your PC/laptop displays the error messages "Preparing Automatic Repair" or "Diagnosing your PC."

Start the computer by booting from the Windows installation CD.

Then, select your language and click Next.

Choose the option to "Repair your computer."

Select Troubleshoot.

Choose the Command Prompt option.

Enter the following instructions in the Command Prompt:

bootrec /fixmbr

bootrec /fixboot

bootrec /scanos

bootrec /rebuildbcd

To exit, use the exit command and then press Enter.

After completion, reboot your PC to see the results.

The "Diagnosing Your PC" message is generally not something to worry about. If your PC was fine before, then the first two steps above usually suffice to resolve the issue.

If there are other obstacles, there are still three other methods that can also resolve "Diagnosing Your PC," especially if you've recently made changes such as updating OS and drivers, installing new software, or adding hardware. If all else fails, reinstalling your Windows might be the last resort

Also read : How to Clean Junk Files on Laptop / Windows PC.

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