Why do I receive the error "Unable to create Tidy Document" when working with Answers?

Environment:

Oracle RightNow CX versions November 2010 and later, when running Windows XP or Windows Vista operating systems.

Resolution:

This error occurs when trying to open, create, or edit Answers on a Windows XP or Vista workstation without Microsoft .NET Framework 3.5 SP1 installed.

.NET 3.5 SP1 is a system requirement for Windows XP and Vista. Unlike .NET Framework Version 4.0, you will not receive a prompt for Version 3.5 SP1 when deploying from your launch page, so you must verify that it is installed on XP and Vista workstations prior to installing RightNow CX November 2010 and later versions.

Microsoft .NET Framework 3.5 SP1 can be downloaded here:

http://www.microsoft.com/en-us/download/details.aspx?displaylang=en&id=22

Full Error Details:

"Unable to create Tidy Document. Error:

Unable to load DLL 'tidy.dll': This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem. (Exception from HRESULT: 0x800736B1"