Overview
Microsoft Windows Error Client.exe Is Not A Valid Win32 Application indicates that there is some issue with Microsoft Windows operating system.  In this article we have given step by step instructions to resolve the issue. The error Client.exe Is Not A Valid Win32 Application generally occurs while installing, opening/launching, updating, uninstalling Microsoft windows.

Please bookmark this page by pressing Ctrl+D in your browser so that you can visit this page again, if your system restarts during the resolution process.

Disclaimer:
The steps given below involves changing system setting and it can damage your PC if the steps are not follow properly. It is highly recommended these steps  should be followed under supervision of an Expert technician. We will have no responsibility or liability in relation to any loss or damage that occurs in the process.

Affected Operating Systems:

  • Windows 10/Windows 10.1
  • Windows 8/8.1
  • Windows 7
  • Windows Vista

Common Error message:

  • “Something went wrong. Error code Client.exe Is Not A Valid Win32 Application.
  • Something Went Wrong. We Are Sorry But We Are Unable To Start Your Program.please Ensure It Is Not Disabled By The System.Error Code: Client.exe Is Not A Valid Win32 Application“
  • There were some problems installing updates, but we’ll try again later If you keep seeing this and want to search the web or contact support for information, this may help – Client.exe Is Not A Valid Win32 Application
  • Windows Update Cannot Check For Updates – Client.exe Is Not A Valid Win32 Application

Reason for error:

Microsoft Windows Client.exe Is Not A Valid Win32 Application error can occur due to following reasons:

  1. Slow Internet Connection
  2. System Ports being blocked.
  3. System Level conflict..

How to Fix Windows error code Client.exe Is Not A Valid Win32 Application:

  • SFC Scan

Open Command Prompt in elevated mode. To open Command prompt in Windows 10, type CMD in search bar (“Ask me anything“) and right click on it and Click on “Run as Administrator“. And in the next window click on Yes.

SFC scan

In command prompt type the following command:

sfc /scannow

sfc scan result

  • Disable Skype/Antivirus

Sometimes Skype and any installed antivirus can conflict with windows update. While updating the windows disable them. You can enable them once the update is done successfully.

If  Microsoft Windows Client.exe Is Not A Valid Win32 Application error still persists even after following the above steps, it means the issue is critical and it should be fixed by manually replacing the update files. It is highly recommended to talk to one of our Support specialist to get the issue resolved.


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Last Updated: 04/23/2016
Solution ID: 81343

Posted In: Microsoft Windows

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