Every time I download and attempt to run any of the upgrades from the site or Stardock I get an error message stating that installation is corrupt. Prior to this I had downloaded and installed with no trouble the updates in question and never once had any issues or crashes until the game rather mysteriously ceased running this morning. I was going along as normal when the game crashed for the first time ever. After multiple tries, all of which ended with the game crashing upon leaving the menu (start new game, load, et cetra), I figured I would uninstall the game and start over. Now I cannot reinstall any of the updates as everytime I try they give me a corrupted download message part way through installation. I have run the same .exe file multiple times, deleted and downloaded another file all with the same results. I have to have done something wrong, any ideas on where I messed up?

UPDATE

While awaiting a reply I decided to play the barebones basic version and even though I reinstalled and have yet to once more add the 40K logos and Witchking mods (it is once more a fresh start), I am still experiencing the issue that lead me to reinstalling in the first place.