Can't install SMC firmware update

[ProfKalkyl]

I've been trying to install this update on my 2010 MBP as it's been shutting down unexpectedly sometimes. But after computer reboots to install the update all that happens is that an empty progress bar shows up momentarily before the computer boots normally. So far I've tried installing the update via the app store and manually, neither works and I'm kind of at a loss as to what else to do, so any help would be appreciated.