Why is Windows 10 So Slow? Speed up windows 10 by clicking on Control Panel, System and Security, Power Options. Change the settings and save.

So, to resolve the issue of Windows 10 slow startup, you should enable the Fast Startup option.

• Go through: Control Panel > System and Security > Power Options. • On the left panel, click on Choose what the power buttons do. • New windows will pop-up on the screen. Click Change settings that are currently unavailable. • Check the radio button adjacent to turn on fast startup (recommended). • At last, save your changes.

Reboot your computer to check if the issue is resolved or not.