Step 1: Download and install the Windows Installer Cleanup Utility.
Step 2: Run Windows Install Clean Up.
Step 3: Highlight Microsoft Office 2010 entry in the list and then click Remove.
Note: If there are any other old or redundant office entries such as Office 2007 or other Office standalone products such as Visio in the list, do highlight and remove them together.
Step 4: Quit the Windows Install Clean Up when cleanup process finished.
Step 5: Close all applications.
Step 6: Click Start, in the Search box, type regedit and press Enter to run Registry Editor.
Step 7: Expand the registry tree on the left pane and locate the following two registry subkeys:
HKEY_CURRENT_USERSoftwareMicrosoftOffice
HKEY_LOCAL_MACHINESoftwareMicrosoftOffice
Step 8: Right-click on the registry subkeys and click Delete to delete those keys.
Step 9: Open Windows Explorer, and then browse to the C:Program Files and/or C:Program Files (x86) folder.
Step 10: Perform the following actions:
If it exists, rename Microsoft Office to “Microsoft Office OLD”
If it exists, rename OfficeUpdate to “OfficeUpdateOLD”
If it exists, rename OfficeUpdate14 to “OfficeUpdate14OLD”
Step 11: Click Start, in the Search box, type %Temp% and press Enter.
Step 12: Empty (delete all files and folders inside) the Temp folder.
Note: If some files can’t be deleted, just skip them.
Step 13: Empty the Recycle Bin.
Step 14: Restart your computer. Try to install Office 2010 again.
These steps should fix the Office 2010 failed installation error.