Hi,
I'm seeing 4 different types of dmp file just to rule out that it isn't hardware please run this app:
Memtest: Please run for at least 1 cycle.
Memtest86+ - Advanced Memory Diagnostic Tool
Error check your drive by right clicking on C and choosing properties, Tools then Error checking. It will say you won't need to but run the scan anyway.
Your system drivers are here:
Lenovo Support - Drivers & Software (US)
It might be that your network driver has become corrupt re-installing might help?