There is a problem with the GPU, Intel HD and Nvidia drivers where the device will get stuck for 7,65 seconds always when working in the explorer. The problem covers a lot of brands and Intel had let us all know they finished by fixing there drivers and the problem is still active. It all started on 07/2017 almost one year now and there is still no fix or big investigation started. Here are all the links of proof about this problem. I found other posts on this forum that are related with this problem and they are almost all closed.
And a video of proof where you can see how hard this machine fails by just updating windows, Intel HD and Nvidia to the latest versions. What normal is for a gaming device. Please support this problem and help fixing this even if it is not Dell related it is still a Dell device.