MacBook Pro Acting Daft?

hey all. running 2011 macbook pro os x. it's upstanding machine, or has been until today.

first, little background: 2 nights ago initiated "software update" before going bed. left system plugged in new firmware update installed. macbook in tip top shape until following night. shutting down, prompted install software updates. thought odd, considering had updated night before. anyways, let updates install (very brief installation, white screen grey apple , progress bar).

morning power , macbook acting positively batty. first of internet won't connect. it's connected wifi network safari states there connectivity issue. simple restart seems fix this.

go on work in keynote, putting important document work. try start itunes , prompted password. enter password, computer freezes. can't move cursor. after 2-3 minutes of locked screen, forced restart holding power button.

upon reloading, computer automatically relaunches applications had been running , promptly freezes again! can't move cursor , system unresponsive keyboard entries (like force quit extension). forced manually restart once again.

third start within span of 30 minutes, mind you. macbook seemingly fine now, though little more punchy usual. i've never had these types of issues, , i'm curious if has suspicious back updates, , can repair / fix this?

 

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