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So when I try installing the game, early into installation, I get this message:

"C:\GOG Games\Saints Row 4\Packfiles\pc\cache\characters.vpp_pc

An error occurred while trying to copy a file:
The source file is corrupted.

You should run the installer's integrity check to verify which files need to be re-downloaded."

I downloaded the install files from the GOG downloader and this is what happened so I tried downloading them the other way and got the same thing. Not sure what to do here.