Hopefully you’re taking the time to browse news first before booting up your PS3 because reports are coming in that the latest firmware update is bricking systems, rendering them useless. So don’t accept update 4.45. Maybe read a book instead?
Specifically, after receiving update 4.45, affected PS3’s never get past the initial boot screen. Even after unplugging and replugging the console, the problem persists. Of course, the problem isn’t hitting 100% of the user base, but better safe then sorry. Or in this case, better your PS3 continues to work than it probably being damaged beyond repair.
Problem after update 4.45 via Playstation Support