since the game has NO copy protection what so ever why would a pirated version be any different than normal version? I have heard those with legit copies have those same problems, including me. I had a couple of those, the game is just very buggy at the moment and patch seems to not install for some people. Backup your save game uninstall, and reinstall then try patch again (I read that if you do this from an account that does not have admin rights it will work if it doesn't work on one with....It is just what I read from some users but it is worth a try)

BTW My install of DL made no registry entries at all but patch installed fine, and I didn't put in in default location(another suggestion).