Microsoft Office Professional Plus 2010 encountered an error during setup.

Try renaming the ‘Microsoft Help’ folder and then install Office.

Follow the steps given below to rename the Microsoft Help Folder:

1.    Click on Start > All Programs > Accessories > Run > Type %Programdata% and Click OK

2.    Rename the 'Microsoft Help' folder as 'Microsoft Help. OLD'

Now try installing Office and check if it works.

Finally got it installed. Step-by-step guide for other users who encounter the same issue:

1. Create a new administrator account.
2. Log on and launch the installer.

If things don't quite work perfectly now:

3. If you recieve errors accessing your ProgramData folder, use the TakeOwnership registry hack to take control of the entire ProgramData folder, and if needed, create a "Microsoft Office" folder with "Microsoft Office 2010 Tools" inside it under %programdata%\Microsoft\Windows\Start Menu.
4. Your error may return at the end of the installation, but don't worry, it's finished and Office is now installed. Switch user (don't log off!) and go back to your own user. Double-check that everything works. Now, to turn off your computer, press and hold the power button for ~five seconds. This will force the computer to shut down instantly, which will close the installer with the error without giving it the opportunity to roll back its changes.