Move the entire game installation from C:\Program Files (x86)\... to a user-writable directory (e.g., C:\Games\Hitman Blood Money ). This eliminates UAC interference.
In the world of Hitman: Blood Money , the only thing more dangerous than a rival assassin is a error message just as you’ve achieved the perfect Silent Assassin rating. This notorious issue often stems from a mix of old-school game design and modern system permissions. The "Ghost Save" Design hitman blood money save failed
The gaming community often develops patches or mods to fix common issues, including saving problems. Look for these on reputable gaming forums or websites. Move the entire game installation from C:\Program Files