[propbeanie]

If you're planning on using much modding, yes v1.5 is the way to go, since probably 95% of the mods use it. Even still though, v1.4 should run OK on your machine. I'm going to guess that you have the game installed in your Program Files (x86) folder, and that may be what's causing your trouble. Go ahead an uninstall the game. When you re-install and the dialog comes up about where you want to install it to, if you can, just edit the line there to where it says C:\Ubisoft\Silent Hunter Wolves of the Pacific, or whatever you want, just NOT in the Program Files directories, or the Root itself (nor the Windows folder...). Then try the patch. Your computer might be locked-down tight, and that's preventing the full activation of the v1.4 patch. If it still does it after a re-install, check your patch file itself, and try downloading it again and re-applying it.