Are you running your computer with Japan system locale? (link to instructions):
Yes, I'm running it with Japan system locale. I changed it on my control panel and also, I have applocale installed.
Game Name:
Grisaia no Kajitsu
Description of Problem:
I already searched a lot, but couldn't find a solution for it. When I run the installation, I keep clicking Next, but this is the message I get at the end:
Your Operating System:
I have a Windows 7 x64 Operating System.
What did you already try?
Turning system locale to Japan, running it as admin. I tried to copy the content of the .mdf to a separate folder on my hard drive, but I'm not allowed to move the "uninst.exe" file. I also tried to remove the "Read Only" box on the files in the .mdf, but I just couldn't.