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Showing developer posts only. Show all posts in this thread.
First thing to try is renaming your AVI folder to AVI_back.
 
I assure you it would not hurt!, please leave it renamed while we try and solve this.

Make sure you have the latest drivers for it. 90% of problems are video card related.
 
I would say your system is now below Min specs for the game. Your system barely met the min specs when the game was released, many graphics sound and events have been added since.
Therefore I would try and minimize the requirments by for example turning the sound off, playing at the slowest speed ...

Adjusting your Video acceleration is a good thing to try, this has been known to solve some problems.
 
I would also recommend a fresh install, since you have changed one file by mistake maybe others have been corrupted as well.
 
Well it take a while to recover from a crash as well. ;)
 
Lower res, and lower color depth, reduce demand on the CPU especially if the Video card does not have a seperate proccessor for them.