Because you can't see your actual situation, here is a possibility of this problem.The graphics card driver is incompatible with the current Win10 system version.You can try to download the graphics card driver corresponding to the current version and reinstall it.If it still doesn't work, since all versions of Win10 are in beta, you can install drivers online!If it's OK, it's 100% sure that your video card has a hardware failure.As shown in the figure
ZOL Q&A>notebook>system>Phone power on>The computer is WIN10. Every time you start it, the screen is dotted. After you get it back, the next time you start it, it will be like this again
