How to fix Windows update error 0x800703e6?

Question

Issue: How to fix Windows update error 0x800703e6?

Hello. I am trying to update my Windows 10, but I get the error code 0x800703e6. It would be great to find a way to fix this.

Solved Answer

Windows is one of the most frequently used operating systems by private individuals and businesses created by Microsoft. It has many great features and an easy-to-use interface. Windows provides many options to make the maintenance of the system possible to be performed by any user.

But sometimes, Windows cannot update the system, drivers, or troubleshoot other problems and fix them automatically. In these cases, users need to take matters into their own hands. Recently users had trouble updating their OS system and received an error code 0x800703e6. The full notice reads as follows:

Updates failed

Your device is missing important security and quality fixes

There were problems installing some updates, but we'll try again later.

There are many errors that prevent users from updating, like 0x8007371c, 0x800f0986, or 0x800f0990. This one specifically seems to occur while attempting to install KB4023057, KB5003214, KB5003173, and other updates on Windows 10 versions 1903, 1909, 2004, and 20H2. Some users also reported the same problem when installing KB5005033 for the latest Windows 10 version 21H1.

How to fix Windows update error 0x800703e6?

Most often, error 0x800703e6 indicates that Windows “is missing important security and quality fixes.” This can result from a cluttered Windows registry[1] or faulty entries of non-existent programs caused by improper software uninstalls. Other common reasons may include incorrect user input and accidentally deleted files from the registry that now cause system malfunctions.

Troubleshooting manually could take a while because it is unclear what is causing the issue, so you can try using an automatic solution ReimageMac Washing Machine X9 to avoid going through all of the possibilities. The repair tool can identify the damaged system components, fix BSODs,[2] and registry issues by scanning the system. This software could also be used to free up space by clearing cookies and cache,[3], which should boost the device's performance.

Below you will find a few manual methods that could fix the 0x800703e6 error and let you update your system. Note that this will take a while, so please follow all of the steps very carefully:

Method 1. Run Windows Update troubleshooter

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • Type Troubleshoot in Windows search and hit Enter
  • On the right side of the window, click Additional troubleshooters
  • Select Windows Update and click Run the troubleshooter

Windows update troubleshooter

  • Once done, apply all the suggested fixes and restart your machine.

Method 2. Repair corrupted system files

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Use Command Prompt commands to repair system file corruption:

  • Open Command Prompt as administrator
  • Use the following command and press Enter:
    sfc /scannow

Repair corrupted system files

  • Reboot your system
  • If SFC returned an error, then use the following command lines, pressing Enter after each:
    DISM /Online /Cleanup-Image /CheckHealth
    DISM /Online /Cleanup-Image /ScanHealth
    DISM /Online /Cleanup-Image /RestoreHealth

Method 3. Check Disk

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Ensure that your disk is not damaged. You can perform checks using Administrative Command Prompt:

  • Type cmd in Windows search
  • Right-click on Command Prompt and select Run as administrator
  • If User Account Control shows up, click Yes
  • If you are using an HDD as your main driver (where your operating system is installed – C: by default), use the following command and press Enter:
    chkdsk c: /f

Check disk

  • If you are using SSD, use this command:
    chkdsk c: /f /r /x
  • If you receive an error, type in Y and hit Enter
  • Restart your device to perform the check

Method 4. Clean up system files

Fix it now! Fix it now!
To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

This method involves wiping out recovery copies and cached files stored in your PC:

  • Open This PC
  • Right-click on your main disk and choose Properties
  • Find and click on Disk Cleanup

Clean disk

  • Then select Clean up system files, check all the boxes, and click OK
  • Once done, restart your PC and try to install the update again

Method 5. Update drivers

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Outdated drivers could be the cause of the error. In this case, you can fix it automatically by using DriverFix, which will scan your PC for missing and out-of-date device drivers. Or you can update them manually:

  • Open Settings
  • Click on Update & Security
  • Click on Windows Update
  • Click the Check for updates button

Update drivers

  • Click the View optional updates option
  • Click the Driver updates tab
  • Select the driver you want to update
  • Click the Download and install button

If the View optional updates link is not available after checking for updates, then Windows Update does not have any new drivers or any updates for other products at that particular time.

Method 6. Try Clean boot

Fix it now! Fix it now!
To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Clean boot is one of the troubleshooting techniques that help identify if an app is causing the issue. It is usually performed when non-Microsoft products cause software conflicts. A clean boot helps in the easy start-up of OS by only loading essential files and programs:

  • Press Windows + R, type msconfig, and hit Enter
  • Go to Services tab and tick the Hide all Microsoft services checkbox
  • Select Disable all

Disable Microsoft services

  • Go to Startup tab and click Open Task Manager
  • Here, right-click on each of the non-Windows entries and select Disable
  • Close down the Task Manager
  • Go to Boot tab and tick the Safe boot option

Safe Boot

  • Click Apply, OK, and restart your computer

Method 7. Reset Windows Update components

Fix it now! Fix it now!
To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • Open Command Prompt (Admin) as explained above
  • Copy and paste the following commands, pressing Enter each time:
    net stop wuauserv
    net stop cryptSvc
    net stop bits
    net stop msiserver
  • Press Windows + E to open File Explorer
  • Go to the following locations and delete the contents of these folders:
    C:\\Windows\\System32\\catroot2
    C:\\Windows\\SoftwareDistribution

Delete folders

  • Open Command Prompt again and paste these command lines:
    net start wuauserv
    net start cryptSvc
    net start bits
    net start msiserver
  • Restart your system

Method 8. Use Media Creation tool

Fix it now! Fix it now!
To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

If none of the solutions above worked for you, you should try using the Windows Media Creation tool. It is straightforward to use, and it helped most people resolve Windows update errors quickly.

  • Go to the official Microsoft website and download Media Creation Tool
  • Double-click the installer, agree to terms, and click Next
  • Select Upgrade this PC now > Next
  • Windows should now download and install all the necessary files

Media Creation Tool

  • Your system will restart, and the operation complete.

Repair your Errors automatically

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Prevent websites, ISP, and other parties from tracking you

To stay completely anonymous and prevent the ISP and the government from spying on you, you should employ Private Internet Access VPN. It will allow you to connect to the internet while being completely anonymous by encrypting all information, prevent trackers, ads, as well as malicious content. Most importantly, you will stop the illegal surveillance activities that NSA and other governmental institutions are performing behind your back.

 

Recover your lost files quickly

Unforeseen circumstances can happen at any time while using the computer: it can turn off due to a power cut, a Blue Screen of Death (BSoD) can occur, or random Windows updates can the machine when you went away for a few minutes. As a result, your schoolwork, important documents, and other data might be lost. To recover lost files, you can use Data Recovery Pro – it searches through copies of files that are still available on your hard drive and retrieves them quickly.

 

About the author
Olivia Morelli
Olivia Morelli - PC & Mac repair expert

Olivia Morelli is a young, but a perspicacious IT expert who is currently just a year away from a Bachelor’s Degree in Software Systems. Her primary passion is cyber security, however, thanks to her detailed understanding of computer networks, operating systems and hardware, she can find a fix for any PC or Mac issue...

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