Windows XP - Failed to install SAVXP

Hi, 

We're having an issue installing Sophos Endpoint Security and Control onto an XP SP3 machine (yes, I know). We have a few others with it succesfully installed, however this one fails to update and the Sophos server console notes the issue as "Failed to install SAVXP: The MSI has failed [0x00000067]". 

I've completly removed SAV and followed multiple KB / forum threads on here to no avail. 

Looking at the installation log gives me this, but I cannot see a clear indication. 

Install from:[C:\Documents and Settings\All Users\Application Data\Sophos\AutoUpdate\cache\rms]
Install to :[(null)]
MsiPackagePath: [C:\Documents and Settings\All Users\Application Data\Sophos\AutoUpdate\cache\rms\Sophos Remote Management System.msi].
Result of loading C:\Program Files\Sophos\AutoUpdate\SAUConfigDLL.dll is: [1720000]
RMS: Current product is not installed.
RMS: Setup Plugin running MsiInstallProduct(C:\Documents and Settings\All Users\Application Data\Sophos\AutoUpdate\cache\rms\Sophos Remote Management System.msi,
REBOOT=ReallySuppress ALLUSERS=1 SOPHOS_TP_TOKEN=1 TRANSFORMS=1033.mst)

Has anyone else has similar issues with this? Any feedback or a solutuion is appeciated. 

Thanks,
David.