Gaming Help....I/O ERROR ON MODS!!!!

  bigdamouk 17:46 27 Jan 03

ive got unreal tournament GOTY ed. version 436.
Ive downloaded tactical Ops 215mbs.
and Strike force 1.8 377mbs......every time i try to install either of these mods it comes up with an 'I/O ERROR CORRUPT INSTALLATION FILE' then aborts......ive downloaded these mods on 5 different occasions from 5 different servers and each time i get this error! ive reinstalled the full game time and time again but still the same.
I am totally clueless to the cause and pretty angry!
It also does this to the latest counter strike patch that ive downloaded.
Any Help would be appreciated greatly.

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