I owned 3 other Dell laptops but this is the first one that has been making an audible sound-on and off- that resembles fan blades. The sound was especially noticeable the entire time Windows 10 was installing updates.  I heard it from three feet away.  I noticed another buyer has the same issue.  The seller has listed it as a 2018 laptop.I contacted Dell tech support and was told that this laptop is beyond the exchange period because it was purchased 81 days ago, which was October 2017.  The agent suggested I mail it for service but a brand new laptop should not require service.  I am also noticing that the prompt freezes frequently when I am typing an email and it takes some time before the typed letters appear in rapid succession.  I need this laptop to run a couple of virtual machines so I am not sure how it will handle the workload.  I contacted the seller and received a response email with some kind of babbling not related to my concern at all. I sent another email a few days ago and received zero response this time.  A new laptop costing nearly $600 should not have issues and require service.  I have contacted Amazon to start a return but then decided to give this thing a chance, but if the noise and typing delays continue then I will send it back.