I turn on my computer ready to enter the depths of internet and browser icon is nowhere to be seen. All icons migrated to the second monitor. Apparently more people are experiencing this so I will share solution that works for me.
My problem was the secondary monitor became primary monitor for some reason. Then the Windows moved my icons where it should be. That is correct behavior. How to set mi primary display again?
Right-click the desktop and pick Display settings. Click the monitor you want to use as default. Scroll down the settings and check Set this display as default.
Voila, icons went back where I want them immediately.