When trying to run the Windows Genuine Advantage validation check located on the Windows Update web site, the following error message is displayed
Validation Incomplete: Unable to Perform Validation (Error Code 0x80080299)
You have encountered an unknown error. Please contact your local product support team for further assistance with this issue.
This issue may occur if the ActiveX Controls add-on is not installed or enabled. The ActiveX Controls add-on is required for the WGA validation check.
Confirm that the Windows Genuine Advantage Validation Tool add-on is enabled.
Start Internet Explorer.
On the Tools menu, click Manage Add-ons.
Confirm the Windows Genuine Advantage Validation Tool add-on is displayed and is enabled.
If disabled, select the appropriate add-on and click Enable, then click OK.
Go to the Windows Update web site again to ensure that the validation process completes successfully.