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. I also ran a SFC /scannow from an elevated command prompt and it didn't find any corrupted files. This problem is in all two user accounts in this computer (Windows 7). Any reason/solution to this problem? Thanks