The right to install the home/business version on pc and laptop for the same user, does not exist anymore like it has been with the 2010 version of office.
Make sure your system date and time is set correct, because when incorrect it can cause some websites not to open and give a certificate error instead.
To overcome re-downloading issues due to internet disconnections, try applications like “free download manager”
VLC is an application reading almost all type of movie files
To save time and money on reloading windows and applications, have a mirror image backup of your entire hard drive.