Code: 80040154 Windows Update encountered an unknown error

Code: 80040154 Windows Update encountered an unknown error

This is a windows problem that can be fixed in the following way:

1. Go to https://support.microsoft.com/en-us/help/971058/how-do-i-reset-windows-update-components

2. After login to the web site you will see a Microsoft Fix it dialog box.

3. On the bottom right corner of the box , you will see Run now button, click on it and download the Microsoft Fix it Application.

4. After downloading run the program, it will as you to restart the computer.

5. Restart and the application will fix the program.

Code: 80040154 Windows Update encountered an unknown error

Hi Emimayer,

The error means there is a problem with the permissions on the registry. The simplest way to fix this is to install the software as the administrator, but you need to modify the permissions on the registry key.

Check out this Techyv post for more information regarding on your issue.

Error code 80040154 appears when using Windows Update

Code: 80040154 Windows Update encountered an unknown error

It seems that error is pretty common on Windows users that have active Windows support. To see what’s causing the problem, you need to perform some checking first. First thing to check is your hard drive. It needs to be checked for errors and other file system problems. Download and install PC Tools Performance Toolkit. Follow the instructions to download and unpack the file.

Once installed, start PC Tools then go to “Recovery” tab and click “Repair Drives”.

Under “Select Drive Operation”, select “Surface Scan” to perform a complete check on the drive and then check “Perform on reboot”. Since the problem is with the operating system because of the failed Windows update, the concerned drive is the system drive or drive C. From the list of drives, select drive C then click “Start” and then “Continue”.

Close PC Tools then restart the computer to begin the test. After the test, try updating Windows again from the Windows Update feature. See if it updates successfully. If the update fails again, try running the System File Checker tool. Click “Start”, “All Programs”, “Accessories”, right-click “Command Prompt” and select “Run as administrator”. Enter your administrator password when you are prompted to continue.

In the command prompt, type without quotes “sfc /scannow” then hit Enter. If you are prompted to insert the Windows setup CD, insert it on your optical drive and continue. When it is finished, restart your computer and try running Windows Update again. If this doesn’t work, download and install the System Update Readiness tool according to your operating system:

• 32-bit versions – Windows 7 with or without SP1, Windows Vista SP1 or SP2, Windows Server 2008 SP2
• 64-bit versions – Windows 7 with or without SP1, Windows Vista SP1 or SP2, Windows Server 2008 R2 SP1, Windows Server 2008 SP2

Once the tool is installed, run Windows Update again then see if it works.