We should really make this clear:
If you REALLY want the game to work without any problems, hissy fits, temper tantrums, etc., then play it on an older version of windows. Windows 98SE and WinME will work fine with the game (even though WinME sucks bad). You should definately expect problems with ff7 and winxp/2k. But the chocobo patch has worked out o.k. That one's good. It seems that in this case our friend cannot run the duck truemotion patch unconditionally. Which may point out a compatability problem. Or not; On the other hand....
I really doubt that the duck truemotion patch would all of a sudden screw up, even on a clean install of winxp. I would definately suspect more Computer Viri (viruses sounds so wrong; I would slap the english dictionary if it was a person) creeping around your computer. Or, you're just pulling our chain to give you movies. Not that I don't trust your integrity, Nauthiz, but it seems that anyone will do anything for everything. For free, that is.