You need to open your antivirus softwares and make an exception for the ValentyneStoriesNecromancy.exe file so it won't be quarantined and deleted by your antivirus. It happens quite often for new games since VSN (and a lot of other similar games) are still a "new program" for Windows, and isn't recognized yet as a "safe" program. Do not worry, there isn't any malware in the game !