rom help again please xD

On some roms when i try to extract them ill get an error while its extracting so far its only been on Grand Theft Auto: China Town Wars but what can i do? This is the error it is presenting Extracting 3517 - Grand Theft Auto Chinatown Wars (U)(Xenophobia).nds Error: CRC mismatch in file "3517 - Grand Theft Auto Chinatown Wars (U)(Xenophobia).nds" in the archive "C:\Users\Staples\Documents\Downloads\3517 - Grand Theft Auto Chinatown Wars (U)(Xenophobia).rar"Another thing is when im using my PC it works just fine right now im using my laptop so any suggestions please

To me it sounds like you didn't finish downloading it. Or maybe there are other parts to the game.

Try using the latest WinRAR.
http://www.rarlab.com/download.htm

alright ill try to redownload it and get the latest winrar thanks guys