Error Installing SQL 2008 SP1 on Windows 7

You are required to install Microsoft SQL 2008 SP1 after installing SQL 2008 on Windows 2008 and 7. After launching the SP1 setup you might receive the following error:

TITLE: SQL Server Setup failure.
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SQL Server Setup has encountered the following error:

Invoke or BeginInvoke cannot be called on a control until the window handle has been created..

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BUTTONS:

OK
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I have resolved the issue by simply closing Internet Explorer, it then installed like a champ!