I am trying to install Compatibility pack on Microsoft Office 2003. First I had performed all update which were installed properly. There were no errors at all. Now once the installation done on reboot I am getting this error. - this is a pre-release version of the Compatibility Pack and can open pre-release 2007 files only. Do you want to check for a newer version of the Compatibility Pack?I ha checked back for update but that also did not worked out. I do not understand what is the actual issue. What it is related to. I had tried a number of attempt to re-install the same, but it did not worked out.