EDIT: This problem does not seem to affect all computers and configurations, but if you are having trouble moving games from one computer to another, this is most likely what is happening:
Copying VNs from one Windows machine to another
Gonna put this here so I can maybe help people who run into the same situation I was in a few days ago.
Basically I got a kickin new Windows 8 computer and wanted to move all my visual novels from my old Windows 7 comp to my new one. As you probably guessed, it’s not as simple as copying files from one directory to another. Depending on the game, there are a number of steps you’ll want to follow. (Note: It’s almost always advised to reinstall the game properly, but sometimes that’s not possible, so this is describing a workaround.)
1.) Move the game directory to the same directory on the new computer
Try to do this if at all possible, but it shouldn’t be impossible to work around installation in case you can’t make the paths match.
2.) Locate the Game’s Save Files
Sometimes these are saved within the source directory, sometimes not. Look around in AppData or Documents for these. Again, when copying, you should try to keep the directory path the same. (Not a big deal if you can’t.)
3.) Locate any Registry objects
The Registry is a key-value store that tracks configuration details of installed programs. Some of Key’s visual novels (and translations) have registry values, and games will not work without them. Run the regedit.exe program to open up the Registry viewer. Run a search (Control+F) for the visual novel names and find all of the registry “folders” that correspond to the game you’re looking for. You’ll want to export these. There’s an option on the top bar to export these registry vales: save all of these to flash drive. Load the flash drive to your new computer and double click on each file to add the Registry key/values to the new computer’s registry. Once the registry keys are added to your new computer’s registry, you should be ready to play!
4.) Optional: If your game still doesn’t work
a.) If your installation/save directories do not match
Enter the regedit.exe again and look for the registry values you just added. for the game that doesn’t work. There is most likely a path that is not configured properly. Go through each of the “Values” of each entry and look for any path names. Configure the values so that the paths are accurate to your new configuration.
b.) If the game still doesn’t work
It’s likely that the translators added registry configurations that you missed. Find the translator’s name and search for any registry keys you might have missed.
Again, if you have the installer disc, you should use that instead. Doing this method will not add the program to the Programs/Features list, and there is no defined uninstaller that will take care of removing the game from your system. To uninstall the game, you’ll need to undo each of these operations.