If you are using a modified version for archival or modding purposes, your antivirus likely moved the file to quarantine. You may need to add an exception for the game folder, but only do this if you trust the source explicitly.
: Install both the x86 and x64 versions of the Visual C++ Redistributable packages from official Microsoft support pages. Step 4: Verify Game Files (For Official Platforms)
If you already have the file Hitman Sniper Challenge.rar but haven’t extracted it, follow these steps to check for danger: