Unfortunately, I had a defective motherboard while under warranty.  After hours trouble shooting the unit at the direction of the Kingdel rep, including taking out cleaning and reseating the SSD & RAM still inoperative.Kingdel Rep's request was I buy a competitors SSD and install it to see if it would fix the issue.  After I pointed out the the Operating System was on the SSD and buying a new SSD would not have the Windows 10 Pro on it that I purchased they requested I buy a competitors RAM install it and see if that resolved the problem, and if not return the RAM to that competitor (as used).  I declined.Eventually, I purchased an identical unit and installed my old SSD & RAM which resolved the issue, i.e. the motherboard had failed.I sent the failed chassis and new SSD & RAM to Kingdel in China with the promise of a refund however it has now been more than three weeks and no refund.  Computer worked well.  Warranty is worthless as it is a least a month turnaround time.  Grrrrr