Trackpad malfunction after last macOS update (Sierra 10.12.3) I am looking for information / help from someone who might experienced similar issue in the past or has knowledge about the problem described below.

During last week I have been experiencing issues with trackpad on MacBook Pro Retina 13' Mid 2014.

It all have started the next day after latest macOS Sierra 10.12.3 update.

Symptoms: 


not registering multitouch commands, like thumb + 3 or 4 fingers, swipes
freezes on the movement just to pick up a second later 
stops to respond at all
moves and send click signals by itself without touching


Some/all of this happen when I try to use trackpad. When left alone, with external usb mouse plugged in, I can use the software mouse without any issue (using external mouse).

I have tried to fix it with:


Restart
NVRAM reset
SMC reset
macOS reinstallation


sadly, none of above helped.

Valuable Info: Apple Diagnostics tool shows that I have problem with memory (PPM002 error code and potential PPM003 and PPM004). Apple code reference page says nothing more about them but to contact nearest Apple Authorized Service Provider.

I will appreciate any form of help.

And yes... My warranty expired just two weeks ago.
My unrecognized trackpad and keyboard issue fixed after cleaning up desktop. A file was corrupting the start up process.