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Startup program entry details:

VSOCheckTask (mcmnhdlr.exe)

This page expands upon the information already available for this entry in the Pacman's Portal Windows start-up programs database.

Normally leave to run at start-up - typically required for the program to function properly or for security/safety reasons

For further information on how to identify and disable startup programs please visit the Introduction page.


Part of older versions of McAfee VirusScan and the now obsolete McAfee VirusScan Online. When Windows boots it checks whether a virus scan is necessary before you do anything with your PC. Typically, this would be the case if a scan was scheduled at boot-up or if a virus was found during a previous scan and VirusScan determined a scan should be run at this time

Startup information:

Registry (Start → Run → regedit)

MSConfig (Start → Run → msconfig → Startup)

Windows Defender (Start → All Programs → Windows Defender → Tools → Software Explorer)

Log examples:

O4 - HKLM\..\Run: [VSOCheckTask] "C:\PROGRA~1\\VSO\mcmnhdlr.exe" /checktask
O4 - HKLM\..\Run: [VSOCheckTask] "c:\ARCHIV~1\\vso\mcmnhdlr.exe" /checktask
O4 - HKLM\..\Run: [VSOCheckTask] "C:\Program\\VSO\mcmnhdlr.exe" /checktask

Other information:


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