A family of Microsoft word processing software products for creating web, email, and print documents.
Try the steps below and check if it helps:
Step 1:
Press the Ctrl + Alt+ Delete keys to open the Task Manager and go to the Processes tab and look for integratedoffice.exe. If you find it, then click on End Process.
You may also run the fix it from the following article to remove the integratedoffice.exe from the registry as well:
http://support.microsoft.com/kb/2809219
Step 2:
When the installation fails there would be some files and folders copied to the computer, so run the fix it mentioned in the link below to remove the traces of Office completely from the computer and then try to reinstall the Office program:
http://support.microsoft.com/kb/2739501
Step 3:
You could also try start the computer in Clean Boot as detailed in the article
http://support.microsoft.com/kb/929135
and try to install Office 365 program.
Note: Once the troubleshooting is done, ensure to restart the computer in normal mode.
In Clean boot mode all startup programs and 3rd party services on the computer will be disabled and starting the computer in this way may prevent conflicts with the installation of the software.
For the error "Office can't do that right now because your product is busy with another task" error when installing Office 2013 or Office 365" see:
http://support.microsoft.com/kb/2809219/en-us
See "General troubleshooting for installing Office 2013 and Office 365" at:
http://support.microsoft.com/kb/2822317/en-us
See ""Something went wrong" error when you install Office 2013 or Office 365" at: http://support.microsoft.com/kb/2827031/en-us
and, if necessary http://support.microsoft.com/kb/2822317 If that does not help, then you might remove all traces of the Office installation by downloading and saving the fixit from the following article:
http://support.microsoft.com/kb/2739501
and then run the fixit by double clicking on it and then, after re-booting your computer, reinstall Office by logging into www.office.com/myaccountwith your registered email address and click Install Office.