How to Disable Taskbar Thumbnail Delay in Windows

Windows includes a default hover delay before displaying taskbar thumbnail previews when your cursor rests on an open application. By modifying a specific value in the Windows Registry Editor (Regedit), you can eliminate this latency entirely so thumbnail previews appear instantly. This tutorial provides step-by-step instructions on accessing the proper registry path, creating the necessary configuration key, and applying the changes.

Step 1: Open the Registry Editor

  1. Press Windows Key + R to open the Run dialog box.
  2. Type regedit and press Enter or click OK.
  3. If prompted by User Account Control (UAC), click Yes to grant administrative privileges.

Step 2: Navigate to the Advanced Explorer Key

Use the left sidebar in the Registry Editor to navigate to the following path, or copy and paste it directly into the address bar at the top:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced

Step 3: Create and Modify the ExtendedUIHoverTime Value

  1. Click on the Advanced folder in the left pane to select it.
  2. Right-click on any empty space in the right pane, hover over New, and select DWORD (32-bit) Value.
  3. Name the new value: ExtendedUIHoverTime
  4. Double-click the newly created ExtendedUIHoverTime entry.
  5. In the Value data field, enter 1 (or 0 to remove the delay completely).
  6. Ensure the Base option is set to Decimal (or Hexadecimal, as 1 remains the same in both), then click OK.

Step 4: Restart Windows Explorer

To make the changes take effect without restarting your computer, restart Windows Explorer:

  1. Press Ctrl + Shift + Esc to open the Task Manager.
  2. Under the Processes tab, locate Windows Explorer.
  3. Right-click Windows Explorer and select Restart.

Once Windows Explorer reloads, hovering your mouse over any taskbar icon will immediately display the live preview without any noticeable delay.

How to Revert Changes

If you want to restore the default Windows hover delay in the future: 1. Open regedit and return to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced. 2. Right-click ExtendedUIHoverTime, select Delete, and confirm. 3. Restart Windows Explorer through the Task Manager.