Re: not valid win32 app.

Hi jen_48,

Sorry to hear that you are still having installation issues. I will try my best to help you resolve this issue. To better guide you, can you tell me what operating system you are running on your computer? What are you trying to run, when you get this error?

If you were upgrading to Windows 8.1 here is a document that may help.

After Upgrading the Computer from Windows 8 to Windows 8.1, a 'Device installation is not complete' Message Displays in HP Solution Center

Let me know and I will be happy to help you.

Thank you,