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Failed to uninstall Sophos Anti-virus (10.3.7) - Error 1721

Windows installer error - 

"Error 1721. There is a problem with this Windows Installer Package. A program required for this install to complete could not be run. Contact your support personnel or package vendor."

It then rolls back.

Autoupdate/RMS uninstalled OK.

OS is Server 2008 

This is a copy of the log.

Any thoughts on what this could be?

2015-01-16 15:30:20 CheckUserIsSophosAdmin: Action started
2015-01-16 15:30:20 CheckUserIsSophosAdmin: Action succeeded
2015-01-16 15:30:20 CheckForSophosClientFirewall: Action started
2015-01-16 15:30:20 CheckForSophosClientFirewall: Action succeeded
2015-01-16 15:30:23 SetClassFilterPresentProperty: Action started
2015-01-16 15:30:23 SetClassFilterPresentProperty: Setting class filter present property to: 1
2015-01-16 15:30:23 SetClassFilterPresentProperty: Action succeeded
2015-01-16 15:30:23 SetProcessorProperties: Action started
2015-01-16 15:30:23 SetProcessorProperties: Action succeeded
2015-01-16 15:30:23 SetRestoreExcludedProcessesProperty: Action started
2015-01-16 15:30:23 SetRestoreExcludedProcessesProperty: SetRestoreExcludedProcessesProperty
2015-01-16 15:30:23 SetRestoreExcludedProcessesProperty: PROCESSOR_ARCHITECTURE environment variable is: AMD64
2015-01-16 15:30:23 SetRestoreExcludedProcessesProperty: Action succeeded
2015-01-16 15:30:28 CheckRegForNullDACLs: Action started
2015-01-16 15:30:28 CheckRegForNullDACLs: Action succeeded
2015-01-16 15:30:28 CloseSavMainWindow: Action started
2015-01-16 15:30:28 CloseSavMainWindow: Action succeeded
2015-01-16 15:30:28 DisableServices: Action started
2015-01-16 15:30:28 DisableServices: SetServiceStartMode failed: Unable to get a handle to requested service SAVService, error 1060.
2015-01-16 15:30:28 DisableServices: DisableServices failed to disable SAVService
2015-01-16 15:30:28 DisableServices: SetServiceStartMode failed: Unable to get a handle to requested service SAVAdminService, error 1060.
2015-01-16 15:30:28 DisableServices: DisableServices failed to disable SAVAdminService
2015-01-16 15:30:28 DisableServices: Action succeeded
2015-01-16 15:30:28 ForceStopSAVService: Action started
2015-01-16 15:30:28 ForceStopSAVService: ForceStopService: Stopping SAVService
2015-01-16 15:30:28 ForceStopSAVService: ForceStopService: service failed to stop, hr=0x80070424
2015-01-16 15:30:28 ForceStopSAVService: ForceStopService: Terminating the service
2015-01-16 15:30:28 ForceStopSAVService: ForceStopService: Terminate failed, hr=0x80070424
2015-01-16 15:30:28 ForceStopSAVService: ForceStopService: Checking if service is still running
2015-01-16 15:30:28 ForceStopSAVService: ForceStopService: Stopping SAVAdminService
2015-01-16 15:30:28 ForceStopSAVService: ForceStopService: service failed to stop, hr=0x80070424
2015-01-16 15:30:28 ForceStopSAVService: ForceStopService: Terminating the service
2015-01-16 15:30:28 ForceStopSAVService: ForceStopService: Terminate failed, hr=0x80070424
2015-01-16 15:30:28 ForceStopSAVService: ForceStopService: Checking if service is still running
2015-01-16 15:30:28 ForceStopSAVService: ForceStopSAVService: Services have been stopped
2015-01-16 15:30:28 ForceStopSAVService: Action succeeded
2015-01-16 15:30:28 WaitForSAVService: Action started
2015-01-16 15:30:28 WaitForSAVService: WaitForSAVService: Walking system processes...
2015-01-16 15:30:28 WaitForSAVService: WaitForSAVService: Finished walking system processes.
2015-01-16 15:30:28 WaitForSAVService: Action succeeded
2015-01-16 15:30:28 RemoveSophosCleanupService: Action started
2015-01-16 15:30:28 RemoveSophosCleanupService: Action succeeded
2015-01-16 15:30:28 UninstallSecurityCenter: Action started
2015-01-16 15:30:28 UninstallSecurityCenter: Exception caught in UninstallSecurityCenter()
2015-01-16 15:30:28 UninstallSecurityCenter: Action succeeded
2015-01-16 15:30:32 RevealMSXML4: Action started
2015-01-16 15:30:32 RevealMSXML4: Info: MSXML4 product code value not found
2015-01-16 15:30:32 RevealMSXML4: Action succeeded
2015-01-16 15:30:32 RemoveSAVI: Action started
2015-01-16 15:30:32 RemoveSAVI: About to wait for event Global\!$_SAVI_!$$!_EVENT_$!__ReadyForUpdate
2015-01-16 15:30:32 RemoveSAVI: WaitForSAVIEvent: Could not open memory mapped file Global\!$_SAVI_!$$!_MMMF_$!__
2015-01-16 15:30:32 RemoveSAVI: Successfully waited for event Global\!$_SAVI_!$$!_EVENT_$!__ReadyForUpdate
2015-01-16 15:30:32 RemoveSAVI: UpdateRequest signalled
2015-01-16 15:30:32 RemoveSAVI: About to wait for event Global\!$_SAVI_!$$!_EVENT_$!__Suspended
2015-01-16 15:30:32 RemoveSAVI: WaitForSAVIEvent: Could not open memory mapped file Global\!$_SAVI_!$$!_MMMF_$!__
2015-01-16 15:30:32 RemoveSAVI: Successfully waited for event Global\!$_SAVI_!$$!_EVENT_$!__Suspended
2015-01-16 15:30:32 RemoveSAVI: Action succeeded
2015-01-16 15:31:11 RollbackDisableServices: Action started
2015-01-16 15:31:11 RollbackDisableServices: SetServiceStartMode failed: Unable to get a handle to requested service SAVService, error 1060.
2015-01-16 15:31:11 RollbackDisableServices: RollbackDisableServices failed to enable SAVService
2015-01-16 15:31:11 RollbackDisableServices: SetServiceStartMode failed: Unable to get a handle to requested service SAVAdminService, error 1060.
2015-01-16 15:31:11 RollbackDisableServices: RollbackDisableServices failed to enable SAVAdminService
2015-01-16 15:31:11 RollbackDisableServices: Action succeeded
2015-01-16 15:31:11 RunErrorScripts: Action started
2015-01-16 15:31:11 RunErrorScripts: Action succeeded
2015-01-16 15:31:11 RestoreMovedFiles: Action started
2015-01-16 15:31:11 RestoreMovedFiles: Action succeeded
2015-01-16 15:31:11 SetUpdateFailed: Action started
2015-01-16 15:31:11 SetUpdateFailed: Unable to create an instance of ComponentManager - SystemInformation cannot be informed of end of update
2015-01-16 15:31:11 SetUpdateFailed: Action succeeded
:55426


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