Unusable Trackpad or the crazy pointer! :-(

I had this same problem a few months ago and I had solved cleaning carefully the trackpad.
Yesterday... again this very annoying malfunction of the trackpad: it doesn't work properly at all and the pointer starts to stop or to move by itself and is almost completely out of control or if it were controlled by a mad drunk. This makes my MacBook (15" late 2011 OSX 10.8.4) completely unusable.
Of course a thorough cleaning has not been helpful but I noticed that after a reboot, for some time everything works fine and only after a while the trackpad becomes unusable again.
Actually, looking at Console I see the message below (always at the time of restart) I don't understand:
kernel[0]: AppleUSBMultitouchDriver::checkStatus - received Status Packet, Payload 2: device was reinitialized
I have no idea if the message is significant or not very useful, and so I have no idea whether the problem is hardware or software or both together... But I'd rather avoid spending money unnecessarily to change the trackpad.
Sometimes, if I use a usb mouse I can control the pointer (now I'm using a mouse...) but yesterday even using the mouse was really not possible to use my MacBook at all.
Here on the forums I found many posts about similar problems (sometimes involving the keyboard as well or just the trackpad, then a specific version of OS X or the battery or the inside trackpad's cable or this or that or ... ...) but no definitive solution. Also because every solution is different under different conditions.
At this point is there some latest news that I missed out on this not-so-uncommon problem ...?
Thanks.

There are several possible causes for this issue. Take each of the following steps until it's resolved.
1. Follow the instructions in this support article.
2. Reset the System Management Controller.
3. If you're using a Bluetooth trackpad, investigate potential sources of interference, including USB 3 devices.
4. A swollen battery in a MacBook Pro or Air can impinge on the trackpad from below and cause erratic behavior. If you have trouble clicking the trackpad, this is likely the reason. The battery must be replaced.
5. There's a report that a (possibly defective) Thunderbolt Ethernet adapter can cause the built in trackpad of a MacBook to  behave erratically. If you're using such an adapter, disconnect it and test.
6. There's also a report of erratic cursor movements caused by an external display that was connected but not turned on.
7. If none of the above applies, or if you have another reason to think your computer is being remotely controlled, remove it from the network by turning off Wi-Fi (or your Wi-Fi access point), disconnecting from a Bluetooth network link, and unplugging the Ethernet cable or USB modem, whichever is applicable. If the cursor movements stop at once, you should suspect an intrusion.
8. Make a "Genius" appointment at an Apple Store to have the machine tested.

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