At first I was happy when I bought this note book DELL G7 7790. However, in less than one year of using it, the troubles started. It started to freeze and then a blue screen would appear saying "watchdog violation". I called support and even after they tried to recover the system, as per maker's instructions, it didn't solve the problem. So,support asked me to send it for repair, and I sent it on May 10th, 2021 and it was returned on May 17th. After updates, the D drive was locked with "bit locker" and even after following all the steps, when I restarted the notebook, it locked again. Also,the blue screen, "Watchdog violation" was back. I called support and Lei Geng helped me to unlock it. Then, after updates, the C drive (where windows is installed), became D drive and the former D drive became C drive. Again, for the 2nd time, I sent it to repair on May 31st and it came back on on June . After all updates, suddenly the screen froze and a blue screen with stripes appeared., https://gyazo.com/bd9853950d015c155aef8106b9e24108 Couldn't even shut it down. I contacted support and they told me to press the "on" button to shut it down. After that, the note book couldn't start up again and Fan Yang asked me to send it to repair. With all these troubles and nothing repaired, Dell should just replace the faulty machine and give me another note book. Or, send me my money back. Purchasing another type of note book, would, of course, be far from the same as this model.