Keyboard / trackpad forces me to cold reboot

It seems to be happening now that every now and then the keyboard and/or trackpad will stop working either entirely or partially. The power button is never affected by this and the software seems to continue to run normally.
Either way it always requires me to force the machine off by holding the power button for 4 seconds. One time when it was just the keyboard that stopped working I rebooted it from the Apple menu and it didn't help. One time it even didn't work from boot up when I started it up after turning it off. It had to be off for 10 seconds.
Sometimes only the delete key and several other keys stop working, and then it seems that the keys type in different characters than are labeled because when this happens the machine doesn't accept my password. Also when this happens the caps lock key does not make the green light go on and off.
This was a simple nuisance until it happened just seconds of rebooting the MBP after it had just happened.
Also if I leave it on long enough when this happens, the keyboard will spazz out and act like the Z key is stuck down. So if a text field has focus it's like z is continually being put in there as if it's held down and it's impossible to stop it without cold shutting it down.
I also stopped hearing the Apple DONG on reboot this morning. The computer had been on all night because I was downloading some stuff, it was plugged in and on a flat surface. When I got up I folded it shut, which put it to sleep, and then put it in my bag to take with me to work.
When I got there I unfolded the screen and then it came out of sleep mode. THe blue light on the front that pulsates while it's sleeping started blinking steadily and nothing happened on the screen. I don't have the manual here so I dunno, I cold powered it off and booted up again, and that's when the DONG stopped sounding. All sound was fine once the software loaded.
Now, I had this application iTunes Track that I used to display the current playing song off to the bottom left of the screen. It's a PowerPC app. Since this hadn't ALWAYS happened I decided to turn it off, and then I rebooted it and held cmd, option, p and r to do the whole restoration thing whatever that does, and I heard the dong, and then it rebooted and I heard the dong again.
What I am HOPING is that this is some software issue that will be resolved in an update. I have already had to take back my MBP once due to constant kernel panics, and their hardware test (both the one on the Mac OS X DVD and the apple store's secret one that they use) did not find any problems at all. This, like the kernel panics did not happen until after I had the machine for a week or so.
I am getting no kernel panics whatsoever now btw.

Try a SMC reset and see if it resolves......Resetting the System Management Controller (SMC) on your Mac - Apple Support
If not then try NVRAM reset and see if it works......How to Reset NVRAM on your Mac - Apple Support
Also, try to go in recovery mode and repair the disk using disk utility......http://osxdaily.com/2012/02/08/repair-boot-disk-mac-os-x-disk-utilit/
If that doesn’t help either then try to do a Safe boot......OS X: What is Safe Boot, Safe Mode? - Apple Support
Or else, unfortunately the last option would be genius bar if there is any trackpad hardware issue.
Hope I have been of any help to you......

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