I have a toshiba laptop with a samsung ssd 860 evo 500GB in which I have installed Windows 10 64 bits. This is the main hard drive. Also I have a second hard drive (not ssd) into an optical drive enclosure. I am using virtualbox and I have virtual box machines placed in the second hard drive.
When I run Windows 8.1 Pro x64 virtual machine as guest on my host windows 10 it is too slow. My laptop has 8GB RAM, and the virtual machine has 4GB assigned.
Why is my guest OS too slow? Any ideas to increase performance and make it faster?