WSUS 3.0 INSTALL ERROR ON WINDOWS SERVER 2008 SP2 X64

This took me 4 nights to figure out how to fix the installation error and get the Windows Server Update Services (WSUS) 3.0 SP2 going on a Windows Server 2008 SP2 x64 server. I guess it must be common for people to encounter the problem I had as it appears to be the WSUS 3.0 SP2's fault that doesn't recognise x64 Windows properly.

How to : Deploy & Configure WSUS 3.0 SP2

Windows Server Update Services 3.0 Service Pack 2 (WSUS 3.0 SP2) provides a comprehensive solution for managing updates to your network. So, rather than having every computer in your organization download megabytes worth of updates over the internet, you can configure a WSUS server to be the only computer that downloads updates and than you configure every other computer in your organization to use the WSUS server as the source of update files.