Hi Plug,

  Try the following:

This error message may also occur if a file in the Temp directory is conflicting with the files used by the installation while it is running.

Fix:  Delete the entire contents of the Temp directory:

1. Double-click the My Computer icon on your desktop, or right-click Start, then click Explore.

2. Navigate to the Temp directory, for example, C:\Windows\Temp.

3. Click in the directory, then right-click and click Select All (or CTRL+A).

4. On the toolbar, click Delete or right-click the selection, then click Delete (or CTRL+X). A confirmation message appears.

5. Click Yes.

Run the installation again to see if the issue is resolved.

If that does not work, try:

This error message is often caused when the uninstallation log file becomes corrupt. This can happen if the installation is somehow corrupt.

Fix:  In the Windows Task Manager, end the process that is running IDriver.exe:

1. Right-click the Windows Task bar, then click Task Manager.

2. On the Processes tab, click the Image Name column to sort it alphabetically.

3. Review the running processes to see if idriver.exe is running.

4. If idriver.exe is running, click it or right-click it, then click End Process.

Run the installation again to see if the error still occurs.

You also said that it took you a while to download the installation. Is it possible the installation file itself is corrupt/downloaded incorrectly?  If yes - you can try to re-download it and see if you get different behaviour.

Please let me know if any of this works!

Cheers,
Andrew