msi has failed

Morning all

i have two pc's on the same site that are comming up with failed to install SAVXP. the MSI has failed.

iv never seen this before so iv got no idea on how to fix it help. here is the log file that i have see i needed to find.

2015-04-15 15:29:56 Info: Logging started: installing/upgrading Sophos Anti-Virus
2015-04-15 15:29:56 Info: InstallFromPath is: C:\ProgramData\Sophos\AutoUpdate\cache\savxp\
2015-04-15 15:29:56 Info: InstallToPath is:
2015-04-15 15:29:56 Info: Detected version of SAV has major version number: 10
2015-04-15 15:29:56 Info: Detected version of SAV has minor version number: 3
2015-04-15 15:29:56 Info: registryInstallTo [overriding InstallToPath] is: C:\Program Files (x86)\Sophos\Sophos Anti-Virus\
2015-04-15 15:29:56 Checking for problem versions of SAVI - Install path:C:\Program Files (x86)\Sophos\Sophos Anti-Virus\
2015-04-15 15:29:56 Veex.dll version '3.55.0.2163'
2015-04-15 15:29:56 INFO: Checking the validity of the VDL manifest file.
2015-04-15 15:29:57 INFO: The manifest file has been successfully validated.
2015-04-15 15:29:57 PROCESSOR_ARCHITECTURE environment variable is: AMD64
2015-04-15 15:29:57 Checking moved file, pastLocation: \classfilterdrivers\i386\sdcfilter.sys NewFileName: \ClassFilterDrivers\w2k_i386\sdcfilter.sys
2015-04-15 15:29:57 Checking moved file, pastLocation: \classfilterdrivers\amd64\sdcfilter.sys NewFileName: \ClassFilterDrivers\wnet_amd64\sdcfilter.sys
2015-04-15 15:29:57 Checking moved file, pastLocation: \classfilterdrivers\ia64\sdcfilter.sys NewFileName: \ClassFilterDrivers\wnet_ia64\sdcfilter.sys
2015-04-15 15:29:57 Checking moved file, pastLocation: \classfilterdrivers\i386\sdcfilter.sys NewFileName: \ClassFilterDrivers\wxp_i386\sdcfilter.sys
2015-04-15 15:29:57 Checking moved file, pastLocation: \drivers\i386\skmscan.sys NewFileName: \drivers\w2k_i386\skmscan.sys
2015-04-15 15:29:57 Checking moved file, pastLocation: \drivers\i386\skmscan.sys NewFileName: \drivers\wxp_i386\skmscan.sys
2015-04-15 15:29:57 Info: SetupPlugin: updateProps.m_MajorUpdate = 0
2015-04-15 15:29:57 Info: SetupPlugin: updateProps.m_DataOnlyUpdate = 1
2015-04-15 15:29:57 Info: SetupPlugin: updateProps.m_OnAccessDriverUpdate = 0
2015-04-15 15:29:57 Info: SetupPlugin: updateProps.m_BootDriverUpdate = 0
2015-04-15 15:29:57 Info: SetupPlugin: updateProps.m_ClassFilterUpdate = 0
2015-04-15 15:29:57 Info: SetupPlugin: updateProps.m_KMSDriverUpdate = 0
2015-04-15 15:29:57 Info: Managed install
2015-04-15 15:29:57 UpdateVersionInfo(), SAU can't supply version info - using msi version
2015-04-15 15:29:57 Info: Logging started: performing minor update to Sophos Anti-Virus.
2015-04-15 15:29:57 Info: Beginning Shared Custom Actions. Logging will appear in Custom Action log.
2015-04-15 15:29:57 Info: Running Set Update Begin shared custom action.
2015-04-15 15:30:27 Info: Return Value from SetUpdateBegin: 0
2015-04-15 15:30:27 Info: Running DeleteRuleFiles(IDEs) shared custom action.
2015-04-15 15:30:27 Info: Return Value from DeleteRuleFiles(IDEs): 0
2015-04-15 15:30:27 Info: Running DeleteRuleFiles(HIPSConfig) shared custom action.
2015-04-15 15:30:27 Info: Return Value from DeleteRuleFiles(HIPSConfig): 0
2015-04-15 15:30:27 Info: Running DeleteRuleFiles(bdls) shared custom action.
2015-04-15 15:30:27 Info: Return Value from DeleteRuleFiles(bdls): 0
2015-04-15 15:30:27 Info: Running CopyHotUpdateFiles shared custom action.
2015-04-15 15:30:27 Info: Return Value from CopyHotUpdateFiles: 0
2015-04-15 15:30:27 Info: Running UpdateSAVI shared custom action.
2015-04-15 15:30:27 Info: Return Value from UpdateSAVI: 1359
2015-04-15 15:30:27 Info: Shared custom actions failed. Running rollback actions.
2015-04-15 15:30:27 Info: Running SetUpdateFailed shared custom action.
2015-04-15 15:30:57 Info: Return Value from SetUpdateFailed: 0
2015-04-15 15:30:57 Info: Running RunErrorScripts shared custom action.
2015-04-15 15:30:57 Info: Return Value from RunErrorScripts: 0
2015-04-15 15:30:57 Info: Update to Sophos Anti-Virus failed.