If you have a valid product key, you can use the Office Deployment Tool (ODT) to create an offline installer. Here's how:
: If you are a volume license holder, you can download the software directly from VLSC. If you have a valid product key, you
An offline installer (or ISO file) is a single, large file that contains the entire Office installation package. Unlike the standard "Click-to-Run" installer, which downloads files while it installs, an offline installer lets you set up the software without an active internet connection. This is helpful if you have a slow connection or need to install Office on multiple computers. Where to Find the Download Unlike the standard "Click-to-Run" installer
If you find a legitimate source where Office 2013 Home and Business is offered for download: which downloads files while it installs
Protecting your data and respecting software licensing is far more valuable than the fleeting illusion of a free download.