How to Disable Diagnostic Startup in Windows 10

By Achilles Hill | Last Updated January 03, 2024

Have you ever enable diagnostic startup in Windows 10? If you give a Yes to this answer, you may find it wastes time especially when you are in a hurry to do something important. However, some users never make any settings about this and computer still get stuck in a diagnostic startup. That's annoying. Just calm down, we will show you on how to disable diagnostic startup in Windows 10.

Here are three parts of this article to help you understand why and how to disable diagnostic startup in Windows 10.

• Part 1: What is the process of starting up
• Part 2: Reasons for automatically diagnostic startup in Windows 10
• Part 3: How to disable diagnostic startup Windows 10

Part 1: What is the Process of Starting up

The moment from we press the power button till the computer gets into the desktop it looks like just dozens of seconds. In fact, many things are running in the background. Here we list the process below for you to understand.

1. 1. Power-on. When pressing the power button, it firstly powers the host and built-in computer fans. Then you can see the indicator light is on.
2. 2. Bootloader. The CPU starts to execute the instructions stored in the ROM BIOS.
3. 3. Diagnostic startup. Computer tests the main components of the system.
4. 4. Load operation system. The computer reads operating system files from disk to memory.
5. 5. Check the configuration file, customize the operating environment of the operating system – read the configuration file and customize the operating system according to the user's settings.
6. 6. Ready to Read Commands and Data – The computer waits for the user to enter commands and data.

Part 2: Reasons for automatically diagnostic startup in Windows 10

Three reasons may cause diagnostic startup:

1. 1. Illegal shutdown. For example, power-off directly. Under such case, the computer has not finished read-write yet. By default, the data is saved in the memory temporarily. As computer suddenly shut down, data saved inside lost. The next time you launch your computer it will detect the error of drive and repair it. You'd better not skip this procedure. Otherwise, it will cause the new read-write error and harm your hard drive.
2. 2. Your hard drive format is FAT 32. FAT 32 requires the computer diagnostic startup when occurring the suddenly power-off.
3. 3. Bad track. A computer will ask for a diagnostic startup when exits bad track.

Part 3: How to disable diagnostic startup Windows 10

To solve the problem above, we show you several troubleshoot.

Solution 1: Optimize and Defragmenter Drive

If you have skipped the diagnostic startup, it will repeat this command every time you open the computer.

Step 1: Press Window + R key to invoke Run dialog. Input "chkdskX:/f" without quotes and click OK. Replace the hard disk letter to X.

Step 2: If it shows you the error of hard drive, click on This PC and right-click on the corresponding drive and select Properties.

Step 3: In the Local Disk Properties window, click on Tool tab.

Step 4: Tap on Optimize button to optimize and defragmenter drive.

Note: If this does not help, the hard drive may exit bad cracks. Backup your files in Drive D then format it.

Solution 2: Fix the error via Registry Editor

Your computer probably exits wrong bytes inside.

Step 1: Hit Window + R key, type "regedit" in the box then hit Enter.

Step 2: Expand the following keys in the Register Editor. HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Session Manager

Step 3: In the right side, find out "BootExecute:REG_MULTI_SZ" key and double-click on it. Type "autocheck autochk " in the box under Value Data. Or you can delete the "BootExecute:REG_MULTI_SZ" key completely.

Solution 3: Change the format of hard drives

Step 1: Right-click on This PC from the desktop and select Manage.

Step 2: Locate Storage > Disk Management. Right-click on the disk with FAT 32 format and select Format.

Step 3: Next to File system, click the Down arrow then select NTFS. Tap on OK to save changes.

Tips: You can also press Windows + R key to launch Run dialog then type "convert X: /fs:ntfs" and Enter. Replace disk letter to X.

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