Yeah i have windows vista 64, graphics ati radeon hd 4670 so i know that's not the problem...anyways when i'm installing the game it gets up to the picture of the cow dancing in feild and then an error pops up saying "Your system has not been modified. Please  re-run installer to try again." error: catastrophic failure. the error always seems to happen at the same place...btw the discs r clean scratch free.. i've tried reinstalling like 10 times gave up for a few months and here i am agian........any ideas would help.

Try this:

The following solution should fix this error for you:

• You will need approx 8Gb of hard disc space. Either all on one drive or 4Gb on one drive and 4Gb on another.
• Create a new directory (folder) on the drive to copy the contents of the CDs/DVD to (for example C:\BW2_CD).
  
• Copy the contents of all the CDs (or the DVD) into this folder and then run Setup.exe from the folder.
  
• The game should now install.
  

Please note that you will still need to have the original CD/DVD in the drive when playing the game.

Common Solutions - by fluKe

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"Deus lo vult!"

I just tried that one and it still didnt work for me. I am using Windows 7 though, I think there may be an issue with that. Any other words of wisdom???