Windows 7: appcrash

hello
I have a problem about my win 7
this error is showing
Problem signature:
Problem Event Name: APPCRASH
Application Name: explorer.exe
Application Version: 6.1.7600.16450
Application Timestamp: 4aeba271
Fault Module Name: qedit.dll
Fault Module Version: 6.6.7600.16385
Fault Module Timestamp: 4a5bdad4
Exception Code: c0000005
Exception Offset: 0005c832
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1065
Additional Information 1: a7aa
Additional Information 2: a7aa91f17ea749d42a4de3b390fa5b3d
Additional Information 3: a7aa
Additional Information 4: a7aa91f17ea749d42a4de3b390fa5b3d

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how can i fix this problem/
thank you

Have you tried running a virus scan? Load up your antivirus software and give your computer a through virus check, if that finds nothing try downloading MalwareBytes. If all else fails try running a chkdsk.