When you try to upgrade or remove PureMessage for Microsoft Exchange, you receive the error
Error 1603 - 'Error applying transforms. Verify that the specified transform paths are valid'.
This error message refers to a file called 1033.MST.
Sophos product and version
PureMessage for Microsoft Exchange
What to do
You will need to edit the Windows registry.
- Open Regedit
- Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\
- Right-click the value 'Transforms' and select 'Modify'. This displays a value similar to 'C:\DOCUME~1\user account\LOCAL~1\Temp\_is87\1033.MST'.
- Delete the contents of the Value data field.
- Run the upgrade or uninstall again.
The temp folder has been cleared out sometime in the past, and this has since removed the 1033.MST file.