EFS Trigger

main.c

#include <windows.h>

int main() {
    HANDLE file = CreateFileA(".\\test.txt", GENERIC_WRITE, FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL|FILE_ATTRIBUTE_ENCRYPTED|FILE_FLAG_DELETE_ON_CLOSE, NULL);
    if (!file || file == INVALID_HANDLE_VALUE) {
        return GetLastError();
    }
    CloseHandle(file);
    return 0;
}

Code to trigger EFS without GUI interaction: