Macbook Pro – Some Keys Not Working!

Hi
I'm running a 15-inch ( mid 2010 ) Macbook Pro with OS X 10.8.5.
Some of my keys have stopped working.
I've been throughout his forum but found nothing that helps.
The 't' key sometimes does nothing and sometimes this... IORTUY
other keys that dont work are: number 5, hypens, square brackets and volume up.
Random I know.
Anyone experienced this?
Thanks
B

I'm on a MacBookPro8,2,
Intel Core i7 2.3 GHz
Boot ROM Version: MBP81.0047.B27
SMC Version (system): 1.69f4
OS X 10.9.2 (13C64)
I have the same issue with some of my keys, it comes and goes, but it's mostly there.
I have to carry a small Bluetooth keyboard with me now, this really *****.
I'm paranoid thinking this might have something to do with a keylogger process, or maybe just some process in the system that keeps taking all the IO bandwidth for the keyboard, I don't think it's hardware related
I've installed an antivirus and performed an exhaustive scan and found nothing wrong.
When I started typing this post I had to go and get the external keyboard, now I'm typing back again with the keyboard, no clue what might be causing it.

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Macbook Pro – Some Keys Not Working!

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