Unable to play Demo; will I have the same issue in the full game?

[MisterBarca]

Originally Posted by bman654

i play on vista 32bit just fine with a very similar computer. perhaps you should post more information on what you mean by "I am unable to play"

The problem is that the Demo doesn't start. A lot of people have posted about this, and the solution was to download that program linked in the official Demo download page. But this didn't help the situation either.