I know this is in bad taste, but what VN is that? It looks like it has good "plot". But in all seriousness, if you haven't configured your laptop to use multiple languages, that may be your problem. (As tahu157 stated above) If you have already done so, then you probably need to download the Japanese supplemental fonts. I run a Windows 10 Device, so your path may be different than mine. Control Panel>Clock, Language, and Region>Language>Add A Language>Add "Japanese"