Only trouble ive seen on my two machines was on my desktop, upgraded from & Ultimate, if i right clicked on taskbar icons i got nothing, but a reboot sorted that... both it and my laptop respond straight away to right clicks..
Now my friends i3 laptop running 2gb of ram was slow at everything, i put it down to a naff slow hdd, but having turned off a few animation and shadow options, which you hardly notice, its feeling much snappier... not as good as my two ssd machines, but very useable.
The only slowdown ive seen was on may laptop is in IE and MS Edge, both where slow to load pages and refused to scroll with the touchpad, but i think that maybe a driver issue with the touchpad, as plugging in a usb mouse and running IE or Edge and no problems and after a few reboots both seam to be loading pages much better now.. just cant scroll still with the touchpad.