I need some quick help DX

I bought Bioshock 2 on Steam.. all is fine and dandy, it is done installing n' patching, then i run it and it auto crashes. I restart my computer, then it works. I then play some League of Legends for a bit and then try to play it again, but it keeps on crashing and the proble report says this:


APPCRASH
Application Name: BioShock2.exe
Application Version: 1.0.0.1
Application Timestamp: 4b2adbf8
Fault Module Name: BioShock2.exe
Fault Module Version: 1.0.0.1
Fault Module Timestamp: 4b2adbf8
Exception Code: c0000005
Exception Offset: 003e9d5f
OS Version: 6.1.7600.2.0.0.768.3
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789


Even when I restart it this happens :/ How can I fix it?? QQ

Could be a bad install. Try deleting the game files and redownloading.