This may help too: http://groups.google.fr/group/microsoft.public.platformsdk.msi/browse_thread/thread/2b92c49e6bff9abf/3c8742f2d64f9669?q=%2Bmsi+%2Berror+%2B1316+-Office&rnum=17&hl=fr#3c8742f2d64f9669 Basically, remove any previous version of xemtex before installing this one. Fabrice