One way is to open Windows “File Explorer”. Locate the font you want and right-click for the context menu. Select either “Install”, or “Install for all users”.
I figured out a workaround for, “The action can’t be completed because the folder or a file in it is open in another program, Close the folder or file and try again.”
This is the easiest one to implement and should probably be first for that reason alone but also because it’s the most common culprit for QuickBooks not being able to email through Outlook.
Exchange Information Store Error 2147221213. Sync time, run gpupdate /force on the console of the Exchange server. After that the information store should mount.