What steps should be tried next to install the validation tool.
Thanks
Install the WGA engine manually
==========================
The WGA engine may have been already installed but is not working properly.
We can use the following steps to reinstall it. This will ensure the engine
files be copied and registered properly.
1. Download the ActiveX cab file from the following link and then save it to
the Desktop.
http://download.microsoft.com/download/a/c/f/acfe4666-1faf-43fd-b6fb-19191521126d/LegitCheckControl.cab
Open the downloaded cab file and we will find the following three files:
GWFSPIDGen.dll
LegitCheckControl.dll
LegitCheckControl.inf
2. Click "Start", click "Run", type: "%windir%\system32" (without
quotations) and
press Enter. Copy the GWFSPIDGen.dll and LegitCheckControl.dll files into
the opened system32 folder.
3. Click "Start", click "Run", type: "REGSVR32 LegitCheckControl.dll"
(without the quotations) and press Enter. We will see a popup message state
this process succeeded.
4. Click "Start", click "Run", type: "inf" (without quotations) and press
Enter. Copy the LegitCheckControl.inf file into the opened inf folder.
5. Right click on the copied LegitCheckControl.inf file in the inf folder,
and then choose Install. The WGA engine will be installed automatically.
After we finish the above steps, please restart the computer and try to
validate the Windows again.