That happened to me when I tried to launch FH with my graphic card updated. After one day, the game worked. Perhaps it's something glitching that may fix itself, by restarting or give it some days. Also, I'm not sure if I'm sure about this since I NEVER had computer with administrator passwords and such - try going to "Downloads" folder and find FeralHeartSetup.exe or something. Execute, but, if it DOES work, put in C:/FeralHeart2, and click yes, if it asks to create the folder. Wait, and test out. I think it will work. But, I'm not sure, I repeat, I've never seen a computer that needs a password to install things...