SQL Server 2005 Tools makes SQL Server 2008 Express install fail

When I tried installing SQL Server 2008 Express, the install failed due to this line. How can I circumvent this, or fix the issue?

• Open Run Menu and type regedit.

• It will open Registry Editor

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Now go to following location.

HKEY_LOCAL_MACHINE > Software > Wow6432Node > Microsoft > Microsoft SQL Server > 90

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Right click on 90 and click on Delete.

• Press Yes to confirm deletion.

Now try to install SQL Server 2008 and it would work this time.

StackExchange Database Administrators Q#21201, answer score: 4