Thinkpad L520 deadlock

[DrThinkpad]

Hi everyone,

My girlfriend's L520 keep getting a deadlock once every few hours. The laptop hangs, nothings responds, the image stays on and the cursor can't move, so I have to hard reboot it.

I think the HDD is out of the equation, as it has been replaced by a Kingston SSD. My next guess would be a driver problem, or the memory.

It is running on Windows 10.

Anyone else experienced this kind of behaviour on a Thinkpad before ?