I'm having this issue with Win 10. When just turned on/rebooted it works like a charm. Everything feels snappy and fresh. Then after some time things start geting sluggish. To the point a reboot is needed to get the wheels turning again. The system I'm running Win 10 on is not starved on recources neither. 24 gig ram, Samsung 250gb SSD and a 400GB Intel 750 PCIe drive and a iCore 7 -6 core processor on a Asus X99-A/USB 3.1 board. Ive tested installing on either of the SSDs with the same behavioure. First program to be affected is the browser. Doesnt matter if it's crome, firefox or ie11/12. Even on new install whitout any software other than browsers. Win8.1 or Win7 does not show this behavioure, so I'm at a loss of what to do since I need win10 for learning purposes. Any suggestions other than ditch win 10 is greatly apreachiated. /Rab. Sorry for all the misspellings. Didn't have time to fix them.