Written by The Assassin’s Creed save games can be found in the following locations:
Windows XP
C:\Documents and Settings\<username>\Application Data\Ubisoft\Assassin's Creed\Saved Games
Windows Vista/7
C:\Users\<username>\AppData\Roaming\Ubisoft\Assassin's Creed\Saved Games
These are the default locations, if they are not in the respective location you can try searching for assassin.ini as they should be in the same folder.
on the PC again after a long break and I started getting graphical corruption such as in the picture below, floors and walls were disappearing completely, it was like a wall hack had been enabled. Checking online I found out the it is a conflict with 
