We purchased 5 Dell computers from Amazon. Recently there are two computers keep blue screen and freeze. We contact Dell support. Dell tech came and check said these two computers RAM were not the Dell original RAM. They rejected to replacing the RAM. When we purchased them, they spec said they are Win 10 pro with 512GB SSD. But I entered the service tag on Dell website and check. It shows Win 10 home, with 256GB SSD. Since the SSD need to be replaced too, Dell ship a 256GB SSD with Win10 home edition to us for replacing only. Do not buy computer from Amazon. You cannot trust the sellers.