TMG 2010 SP2 Upgrade Error

I came across a “typical” Microsoft error while upgrading my TMG 2010 SP1 to SP2. I say typical because the error message is confusing and has no relation to the actual cause of the problem. Well, there is a relation and you will only understand it if you know the solution upfront.

rollup 1 for Forefront tmg 2010 sp2 released

Microsoft has released rollup 1 for Forefront Threat Management Gateway (TMG) 2010 SP2. The rollup has 12 fixes for known issues. To install this update, you must be running TMG 2010 SP2.