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Could I ask also quite an obvious question - did you try to install it on a different computer? Just to check.

That would be a great test. I start to think the problem comes from your computer =/

I thought we all had that in mind... otherwise there would have to be others with the same issue. After all, he is downloading the same thing everyone else has. Now he did say that other software doesn't have that problem, but what are the other applications? Some can be dependent or independent of a computer's hardware, such as graphics cards. Can TVP be opened in safe mode? That might be a useful test too.

I am having the same problem, 64-bit PC as well. Did you ever find a solution?

The bug came from a corrupted config on very specific situations.
Should be fixed in v11.06, unless someone still experience it.