When i try to play Oblivion after i click play on the menu it will right away come up with an error saying it has stopped working and the problem details are:
Problem Event Name: APPCRASH
Application Name: Oblivion.exe
Application Version: 1.2.0.416
Application Timestamp: 462392c7
Fault Module Name: StackHash_b4ee
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Code: c0000005
Exception Offset: 715d0000
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 4105
Additional Information 1: b4ee
Additional Information 2: b4ee5de6a2322745523997a782b35692
Additional Information 3: 277e
Additional Information 4: 277e19c30fbd5f6bb531ec9e027c37c3

Please respond to this message with any information.

Until you complete more of a report, we have too little to go on from this little bit, assuming you have a PC version. You haven't named any part of the environment within which you are trying to run the game, neiether the software, nor the hardware (we are not clairvoyants here). Did your system pass the Game-o-Meter at YouGamers?

Post a dxdiag.