I recommend that when able, you do these updates. Full battery, newly formatted-in-camera memory card, no lens or a good Canon lens on the camera, and then do the update. Features and fixes could be useful, and there may be undocumented fixes also, I suspect.
There’s new firmware for the 7D, here: http://web.canon.jp/imaging/eosd/firm-e/eos7d/firmware.html
I’ll update mine this morning.
UPDATE: I just updated it. All well, but note, the upgrade reset my image number to 1, which I do not like. (NOTE: never use “do not import suspected duplicates” to ON in Lightroom, since LR appears to look just at the file number. This has cost me images!)