Windows 10 installed beautifully and seems to run fast on my Toshiba laptop but the screen flashes every 30 seconds. When it flashes it looks like a small window opens and closes immediately. Any dialogue box open is reset, and there is disk activity. 2 tasks pop up to the top of the list in Task Manager: dwm.exe and explorer.exe. It happens all the time, whether there are any applications open or not.
Very annoying! anyone else experience this or have a solution?

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