windows mail vista 32bit

After upgrading to Trend Micro Latest version, windows mail won't start - it says internal error. The same Trend update on the desktop computer worked fine.
I've copied the contents on the c:\users\[user]\appdata\local\microsoft\windows mail folder to another folder and then deleted the contents of the original.  I restarted Windows and booted windows mail ok but the message contents weren't there of course. I exited WM and restarted it but the error came back - internal error ......winmail.exe
Any idea what's going on here please