Windows 7: Explorer stopped working error

I get the explorer has stopped working error often.
Problem details are :
Problem signature:
Problem Event Name: BEX
Application Name: Explorer.EXE
Application Version: 6.1.7600.16404
Application Timestamp: 4a765076
Fault Module Name: StackHash_0a9e
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Offset: 133c7e30
Exception Code: c0000005
Exception Data: 00000008
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

Read our privacy statement online:
Windows 7 Privacy Highlights - Microsoft Windows

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt


Please help me.