sometimes once is enough to royally bork you though. i had one catch a file in the middle of a patch installer. it halted the ONE file from being copied, but the installer (sort of) carried on. the result was some godawful mess of a patch job that left the game in a state where it wouldn't work, and flat out wouldn't run the patch again or its uninstaller (kinda like how the 1.06 patch wouldn't go over ST in FS1 retail). i don't remember exactly, but the final solution was something like manually delete the install folder and run a registry cleaner to get rid of leftover references, and then reinstall the 10+ GB. and i didn't even have the install disks with me at school, i had to wait for the next holiday break i went home for.