Windows Update Error 80070426

When I try to update windows I get Windows Update Error 80070426. Currently my Software licensing is Started and I have it on Automatic. I have restarted the licensing and it still doesn't work. I can't understand what the other posts about the problem are saying.

Hello Londostar,

Thank you for using Microsoft Windows Vista Forums.

This problem occurs if the Software Licensing service (Slsvc.exe) is not running while updating windows.

To work around this problem, follow these steps:

Restart the computer.

Make sure that Slsvc.exe is running before you start the update. To do this, follow these steps:

1. Click Start and type Services or services.msc in the search box and then click on Services under Programs section of the search results on top pane.

2. If User Account Control asks your permission to continue, click Continue. If UAC asks for administrator’s password, enter a valid password.

3. Scroll down the list to the service Software Licensing and double-click it.

4. In the properties window of the Software Licensing service, set Startup type to Automatic.

5. Click Start to start the service. If the status is already running, click the Stop button and confirm with Yes to stop the service. Restart the service by clicking the Start button.

6. Click OK to exit from Software Licensing’s Properties window and close the Services window.

If that does not work, let us try "Fix it".

Microsoft has released a new "Fix it"solution that should automatically solve your problems with Windows Update. Just click the link below and follow the instructions.

If the issue still persists, let us try the following method.

Microsoft released the System Update Readiness Tool to resolve certain conditions that could cause installing updates and other software not to work. You do not have to manually run this tool. This tool is offered automatically through Windows Update to computers that have a condition that the tool could resolve.

Let us follow the instructions in the link below, which will help you in resolving the issue.


Step 2

The System File Checker tool

To determine whether the issue that you are experiencing is caused by one or more system files that are used by Windows Vista, run the System File Checker tool. The System File Checker tool scans system files and replaces incorrect versions of the system files by using the correct versions.

To run the System File Checker tool, follow these steps:

1.    Click Start

Collapse this imageExpand this , and then type cmd in the Start Search box.

2.    Right-click cmd in the Programs list, and then click Run as administrator.

Collapse this imageExpand this imageIf you are prompted for an administrator password or confirmation, type your password or click Continue

3.    At the command prompt, the following line, and then press ENTER:

sfc /scannow

Let us follow the instructions in the link below, which will help you in resolving the issue.


Hope this helps

Suresh G-Microsoft Support


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Question Info

Last updated October 24, 2020 Views 28,464 Applies to: