Had bought a copy of GTA SA recently. Loaded it onto laptop ok, but when I tried to run the game it came up with an error message saying "Original disk could not be found or authenticated", although it is in the drive! I thought it could be an error with the disk an exchanged it for another copy, but this has done exactly the same. Since then I have tried 2 No-Cd patches, I can get a bit further i.e. it loads the intro sequence but then when that has finished it just goes back to the desktop.
Any suggestions?