This is the error report:

Problem signature:
Problem Event Name: APPCRASH  
Application Name: taskmgr.exe  
Application Version: 6.1.7600.16385  
Application Timestamp: 4a5bc3ee  
Fault Module Name: hostv32.dll  
Fault Module Version: 0.0.0.0  
Fault Module Timestamp: 4c5c027d  
Exception Code: c0000005  
Exception Offset: 0000000000068b73  
OS Version: 6.1.7600.2.0.0.256.48  
Locale ID: 1033  
Additional Information 1: bf4f  
Additional Information 2: bf4f79e8ecbde38b818b2c0e2771a379  
Additional Information 3: d246  
Additional Information 4: d2464c78aa97e6b203cd0fca121f9a58  

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Whenever I open the task manager, within a few seconds it crashes, saying it has stopped working with the above report. I took the fault module (hostv32.dll) and scanned it with avast but it found no threat. Any reason/solution to this problem? Thanks