Windows 7: windows explorer stopped working

Problem signature:
Problem Event Name: APPCRASH
Application Name: Explorer.EXE
Application Version: 6.1.7600.16450
Application Timestamp: 4aeba271
Fault Module Name: boost_log-vc71-mt-1_33.dll
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 44105850
Exception Code: c0000005
Exception Offset: 000049dd
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1033
Additional Information 1: a7aa
Additional Information 2: a7aa91f17ea749d42a4de3b390fa5b3d
Additional Information 3: a7aa
Additional Information 4: a7aa91f17ea749d42a4de3b390fa5b3d

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pls help. i get this error randomly

Internet Explorer - Reset

See if this doesn't help..

Run system file check too:
SFC /SCANNOW Command - System File Checker

i do not use ie. i use ff. but will try anyway

no problem. also after running a scndsk, also no problems but the error, as said earlier, randomly appears.