Many applications and files run alongside Microsoft office software. One of these files is Pro11.MSI which allows you to customise anything associated to office software. This file incorporates security and language settings, installation sources and the setup process. If you do not have the installation DVD for MS Office and are therefore unable to update Pro11.MSI file, you can manually create an XLStart file. Follow the steps below in order to resolve this issue.
drive: \Program Files\Microsoft Office\Office11
drive: \Program Files\Microsoft Office\Office10
drive: \Program Files\Microsoft Office\Office