"instruction at referenced memory could not be written" when joining the server

[bogddan2]

Earlier Rust worked well and now during loading big monuments, medium monuments and after them I get an error "instruction at referenced memory could not be written" and I am forced to turn off the game. Another is "Untrusted system file" .I have done the MemCheck and used /scannow , /shkdsk. No errors or corrupted files were found. I reinstalled the easy anti cheat, and checked if I had latest versions of drivers. Reinstalled Rust multiple of times, tried to open it as an admin. Till last Tuesday I Rust worked well and now i cant join the server.

Processor: Intel(R) Core(TM) i3-4150 CPU @ 3.50GHz
RAM: 8GB
System type: 64-bit Operating System, 64x- based processor
GeForce GTX 970
100GB+ fee space on a disk, SSD in use.