Setting up a new installation of Office 2010 Standard on a computer , and thanks to the standard unistall procedure of Norton Internet Security, the computer restarted half way through the installation. Re installation produced the following error message at the end of set-up HRSERULT:OX80070BC9 To fix this error , download and run the Office 2010 un-installer from here After this has completed , give the computer a reboot and try again , and it will complete this time!