Dec 12 22:32:25.313 [notice] Tor v0.2.3.22-rc (git-4a0c70a817797420) running on Linux.
Dec 12 22:32:25.313 [notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning
Dec 12 22:32:25.313 [notice] Read configuration file "/etc/tor/torrc".
Dec 12 22:32:25.319 [notice] Initialized libevent version 2.0.19-stable using method epoll (with changelist). Good.
Dec 12 22:32:25.319 [notice] Opening Socks listener on 127.0.0.1:9050
Dec 12 22:32:25.319 [warn] Could not bind to 127.0.0.1:9050: Address already in use. Is Tor already running?
Dec 12 22:32:25.319 [warn] Failed to parse/validate config: Failed to bind one of the listener ports.
Dec 12 22:32:25.319 [err] Reading config failed--see warnings above.

I've tried reinstalling it and I always get this error after powering off and back on, despite it working fine directly after the install...