SE5 - 1.17 Patch Out

[geoschmo]

I was having a similer problem when I patched to 1.17. The game was getting errors and wouldn't load after patching so I uninstalled and reinstalled and then was getting an error that the source was corrupted when trying to load it again fomr the CD. I ended up trying it a couple times and it finally worked when I installed and changed the directory name. I thought that was very strange since I had deleted the original directory anyway. I chalked it up to a dirty cd drive because since then it's worked fine, but it sounds similer to your problem.