Windows Live C0000005 When I Go On Msn, It Comes Up As Windows Live Messenger Is Not Working. When I Click On View Problem It Says:?

When i go on msn, it comes up as Windows Live Messenger is not working. When i click on view problem it says:? - windows live c0000005

Problem: APPCRASH
Application Name: msnmsgr.exe
Application Version: 8.5.1302.1018
Application Timestamp: 4717a53b
Fault Module Name: HookAPINT.dll
Fault Module Version: 3.10.0.11120
Fault Module Timestamp: 49c30a74
Exception: C0000005
Exception Offset: 00001b2d
OS Version: 6.0.6000.2.0.0.768.2882382797
Locale ID: 1033
Additional Information 1: BD0E
Additional Information 2: 143e1d4ff458d706d6cc5cc2e54ef861
Additional Information 3: f8fb
Additional Information 4: d9ae50c8a399e21d5d1d4ace0f0028ca

What should I do?