After further observing, here's what I found. Affinity goes crazy when I open svg files (especially if there are several svg files opened, like more than 3) and if I leave them opened for more than 20-30 minutes, while working with another affinity file. If they remain opened, Affinity starts raping the CPU :). As soon as I close the svg files, everything goes back to normal. I attached a screenshot of the CPU usage by Affinity. I have an I5-4690 processor, and a Geforce GTX 1060 video card. Would the older model of processor be the problem? I didn't have this problem with my old video card (gtx 750). I changed to 1060 recently (and windows 10) and that's when these things started to happen.