Windows 10 hides the scrollbars by default. If you think this is annoying because it always takes extra time before you can slide a scrollbar, this guide describes how to change the settings to always show the scrollbars.
Click the “Start” button on the taskbar or press the “Windows” key on the keyboard. Click on the gear icon to open the Settings window.
In the Settings window, click on the “Ease of Access” button.
The Display section should already be shown. If it doesn’t, click on “Display” in the left column. In the right column, under the header “Simplify and personalize Windows”, there is the option “Automatically hide scroll bars in Windows”. Click on the slider to turn the option on or off. To stop the scrollbars from hiding, set the slider to “Off”.