Hi RaF,
The automated analysis of 111318-7984-01.dmp suggests a hardware problem and the other could also be a hardware problem. Both could also be caused by stack corruption, though. Dell's usually come with decent hardware diagnostics you can get to through the boot menu (hitting the F12 key from a cold boot, I believe). Have you already run a full system scan with that utility?
It looks like you're using Sophos for security but I see a Sophos driver loading which has a 2013 timestamp. Drivers older than 2015 make me nervous on a Window 10 system. I'd recommend checking to make sure you're on the latest version which supports Windows 10. If there is no update, please try uninstalling the Sophos product and just using Windows Defender for security; at least while troubleshooting.
The hardware diagnostics are best run overnight as it can take a while for a full system diagnostic scan. The Sophos update/uninstall would be something I'd recommend trying in the meantime.
If the problems continue please rerun the Sysnative collection app and attach the new zip. It's usually asked that people temporarily change the system language to English to maximize the number of people who can review the system logs. Unfortunately, I only know English and the logs are all Greek to me. 
Please do let us know how it goes.
