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Error Message:"An error occurred during the license installation"while installing Windows Vista through WAU.

Sometimes when you try to perform a Windows Anytime Upgrade in Windows Vista, you may see a Software Licensing Commerce Client (SLCC) dialog box and an error message.This article explains what to do if you get the error message.

Sometimes when you try to perform a Windows Anytime Upgrade in Windows Vista, you may see a Software Licensing Commerce Client (SLCC) dialog box. This dialog box will show you an error message that reads: -

"An error occurred during the license installation"

Let us discuss the cause of the Problem:-
Whenever the Software Licence Service (SLVC.EXE) does not run during the upgrade process, this problem occurs.

There are very simple steps to resolve the issue: -
  • Close the SLCC dialog box, and then restart the computer.
  • Make sure that Slsvc.exe is running before you start the upgrade process. To do this, follow these steps:
  1. Click Start, type "services" in the Start Search box.
  2. Then click Services in the Programs list.If you are prompted for an administrator password or confirmation, type your password, or click Continue.
  • Use the download link from your purchase confirmation e-mail to start the upgrade process again.

This should be able to resolve your issue
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