Hi,
I understand it is quite disappointing when the program does not work as expected.
I need more details to assist you with the issue:
What is the exact error message you get on the screen?
Have you tried removing the Office keys from the computer?
If you have not tried, please try to manually remove the traces of Office completely from the computer.
http://support.microsoft.com/kb/2739501
(Refer to the section Remove Office manually).
Note: Ensure to read the disclaimer or take a
backup of the registry before modifying it.
Once removed, restart the computer and then try to install the Office suite in clean boot mode.
http://support.microsoft.com/kb/929135
Note: Ensure to restart the computer to normal mode once the troubleshooting is completed.
Clean boot is performed to disable all start up programs and 3rd party services on the computer and check if they are conflicting with the Office program. If so, you may disable the unwanted software which conflict with the suite or update the same.
I hope the above steps help. If you have further queries let us know and I will be glad to assist you.
Thank you.