Hard drive corruption

Hallo
I wanted to reinstall a game I play but when I install it I get this error:
The installer was unable to read the file "C:\Program Files\Common Files\Blizzard Entertainment\World of Warcraft Installer\Movies.mpq". This error may be caused by problems with the media or drive at C:\--for example, a scratched or dirty CD-ROM/DVD-ROM, hard drive corruption, or a networking problem while downloading the installer. (The data being read was "enGB\WOW_Intro_BC_1024.avi", and the error code was 5.) If this problem persists, please contact Blizzard Technical Support. (Converter::Load)
Does enyone know what I can do?
Thanks

Sounds like you need to download the game again, the original files may have been corrupted or deleted.
You should at least run CHKDSK C: /F to fix any file system errors.

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    After this was completed my laptop ran a little slow for an hour or two while Spotlight re-indexed the hard drive. After this it was back to normal and running quite smoothly.
    Sorry I can't be more specific on the disk part, I'm offshore & don't have my Mac with me.

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