When did you take these measurements? After a new install, Windows can be busy with background activity because it doesn't try to finish everything at the same time. Some update tasks are delayed to keep good user performance.
Wait about 20-25 minutes for Windows to settle down, before making any benchmarks.
Please show your running processes
Windows automatically allocates resource usage based on the amount of RAM. This is why many "gamer" images deceptively use screenshots from VM installs to impress their audiences with, since it drastically lowers processes/threads/handles without any actual tweaking effort or knowledge.I happened to notice that if in virtualbox I allocate 2048 RAM for my iso(instead of 4096), I get almost half as many processes. How can that be?