Office 365 keeps disappearing

We attended a customer’s home who told us that she had to keep reinstalling her Office 365 because it would disappear from her computer when she booted up in the morning.
Upon arrival she showed me that she downloads the Office 365 installation file using her Husband’s computer and put it on a USB stick and then installs from there.
The problem is that the 365 installation file is custom created for the computer that is downloading it. You can’t transfer the file to another computer.
I then proceeded to log into their Microsoft account on her computer and downloaded the Office 365 to her computer directly.
Problem solved!