How to Turn On or Off Peek at Desktop in Windows 10
You can use Peek (aka: Aero Peek) to preview the desktop when you move your mouse to the Show desktop button at the end of the taskbar. This can be useful for quickly viewing desktop icons and folders, or when you don’t want to minimize all open windows and then have to restore them.
Peek also allows you to see taskbar thumbnail live previews of open items when you hover over their taskbar thumbnail.
Peek is turned on by default in Windows 10.
This tutorial will show you different ways on how to turn on or off Peek to preview the desktop for your account in Windows 10.
CONTENTS:
EXAMPLE: Peek at desktop

EXAMPLE: Taskbar thumbnail live preview

OPTION ONE
To Turn On or Off Peek from Show Desktop Button
1. Right click or press and hold on the
Show desktop button at the end of the taskbar (just to the right of the clock), and click/tap on
Peek at desktop to check (turn on) or uncheck (turn off) for what you want. (see screenshot below)
If Peek at desktop is grayed out, then you will need to check Enable Peek in Option Three:.

OPTION TWO
To Turn On or Off Peek in Settings app
1. Open
Settings, and click/tap on the
Personalization icon.
2. Click/tap on Taskbar on the left side, and turn on or off
Use Peek to preview the desktop when you move your mouse to the Show desktop button at the end of the taskbar on the right side for what you want. (see screenshot below)
If Use Peek to preview the desktop when you move your mouse to the Show desktop button at the end of the taskbar is grayed out, then you will need to check Enable Peek in Option Three:.
3. You can now close Settings if you like.

OPTION THREE
To Enable or Disable Peek in Visual Effects Settings
1. Open your
Visual Effects settings.
2. Check (turn on) or uncheck (turn off)
Enable Peek for what you want, and click/tap on
OK. (see screenshot below)

OPTION FOUR
To Turn On or Off Peek using a BAT file
The downloadable .bat files below will modify the DWORD values in the registry keys below.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced
DisablePreviewDesktop DWORD
0 = On
1 = Off
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\DWM
EnableAeroPeek DWORD
0 = Off
1 = On
1. Do
step 2 (on) or
step 3 (off) below for what you would like to do.
2. To Turn On Peek
This is the default setting.
A) Click/tap on the Download button below to download the BAT file below, and go to
step 4 below.
Turn_On_Peek.bat
Download
3. To Turn Off Peek
A) Click/tap on the Download button below to download the BAT file below, and go to
step 4 below.
Turn_Off_Peek.bat
Download
4. Save the .bat file to your desktop.
5. Unblock the .bat file, and run it.
6. You will now notice your screen flicker as a command prompt quickly opens and closes to apply the registry changes and restart explorer.
7. You can now delete the downloaded .bat file if you like.
That's it,
Shawn