Not sure how often this happens (happened to me recently), but whenever a Main Drive crashes and you have to go through rebuilding everything the one pesky PITA is 'installing' your active/used fonts again and until you do, every time a working image file is opened the software usually lets you know there's a font missing over and over until you get them re-installed.
Assuming you are keeping backups of your graphics files anyway, be sure and include a step to copy the Fonts Folder in Windows on the Main Drive to your standalone backup location. Takes a matter of seconds and can go a long way to eliminate frustration later.
This entire backup Folder can be easily copied back on a new Windows install to eliminate down time to find and re-install fonts.
