I upgraded to Windows 10 on my laptop. After turning off several "privacy" invaders it seems fine. I too can't get Windows 10 to believe there is a printer in the room...lol even though it's right behind the laptop. I haven't worried about it though I rarely print from the laptop.
Check to see if more than one anti virus program is running.
I have noticed a long page load time browsing the internet. But that could be my cable internet provider. We get speeds up to or near 50 Mbps, but if something is bogging the system down the speed drops. I found that out last year when my PC (desktop) went in for a check up. I had AVAST but Windows Defender wouldn't shut off so my computer was really slow. The tech uninstalled Defender and I uninstalled Avast and now use Kaspersky. My PC (desktop) runs great now.