i've been receiving this message since i use Board manager from preferences: https://arduino.esp8266.com/stable/package_esp8266com_index.json
i even can't verify/ compile any codes including "Blink", its always give me this message:
fork/exec C:\Users\User\Documents\ArduinoData\packages\esp8266\tools\xtensa-lx106-elf-gcc\2.5.0-4-b40a506/bin/xtensa-lx106-elf-g++.exe: An error in a system binary was detected. Try refreshing the PC to fix the problem.
Error compiling for board NodeMCU 1.0 (ESP-12E Module).
But if i change the board to arduino Uno/ nano, it became normal.