Windows is off when run gulp watch

Hi There

I'm working on a project which I'm using Gulp . All was Okay before i used Autoprefixer Plugin and Watch Command . Now when I run gulp at the terminal. My windows 10 is off without any Error message .

gulpfile.js code

var gulp = require("gulp"),
    image_minify = require("gulp-image"),
    plumber = require("gulp-plumber"),
    autoprefixer = require("gulp-autoprefixer");

/* Image Minify */
gulp.task("imageMinify", function() {
    gulp.src("assets/images/**/*")
        .pipe(plumber())
        .pipe(image_minify())
        .pipe(gulp.dest("assets/images/mini"));
});

/* Css Autoprefixer */
gulp.task("prefix", function() {
    gulp.src("assets/css/*.css")
        .pipe(plumber())
        .pipe(autoprefixer({ browsers: ["last 10 versions"] }))
        .pipe(gulp.dest("assets/style.css"));
});

/* Watch Function (watch the src and make action) */
gulp.task("watch", function() {
    gulp.watch("assets/images/**/*", ["imageMinify"]);
    gulp.watch("assets/css/*.css", ["prefix"]);

}); 
/* Default Function */
gulp.task("default", ["watch", "imageMinify", "prefix"]);

Package.json Code

  "devDependencies": {
    "gulp-autoprefixer": "^4.0.0",
    "gulp-image": "^3.0.0",
    "gulp-imagemin": "~3.3.0",
    "gulp-plumber": "^1.1.0"
  }

Any Help Please ?

Thanks In Advance

The problem was a performance issue

My windows was V 10 and Ram was 4

The solution that worked for me was exchange the window version from 10 to 7 ultimate and it works well

Another good solution that change Ram with 8 or higher
But I preferred the first one as I wasn't comfortable with windows 10 performance :)