I have already tried adding the registry entry in HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced as ExtendedUIHoverTime with a value of 30000 seconds but it doesn't work. It still shows the Microsoft damned thumbnails, any idea?


7+ Taskbar Tweaker can disable taskbar thumbnails. It's very lightweight and supports a lot of other useful customizations.

Screenshot of 7+ Taskbar Tweaker's window

  • It's nice, but it only works while the program is running.. It doesn't actually change something in the regedit or Win options. Do you know the entry that it changed it in the registry so it can be done manually? – Mike Dec 14 '18 at 3:11
  • @Mike The idea of 7+TT is to keep it running and it's built with this in mind. It works by patching Windows components in memory, so it doesn't waste CPU and uses negligible amount of RAM. No reason to worry that it's running in the background. Just install it, configure it, forget about it. – gronostaj Dec 14 '18 at 8:02
  • Thanks for the prompt reply.. but what is the actual patching that happens in the memory or temp. registry edit that it's actually done by it? II tried to look using "Regfromapp", but I couldn't find it. – Mike Dec 14 '18 at 9:51
  • @Mike It doesn't edit anything in the registry. Most of 7+TT's features aren't available as registry tweaks. It patches Windows's code to achieve these effects. – gronostaj Dec 14 '18 at 13:01
  • OK, what's that patch then? Do you know of a way to find it? Thanks. – Mike Dec 15 '18 at 0:14

I used this method:



In the right-hand pane, right-click and choose New – DWORD (32-bit) Value . Give it the name NumThumbnails. You’ll create the 32-bit DWORD whether you have 32-bit or 64-bit Windows. By default, it should have a value of 0, which is what we want.


@anadrol's answer is correct and doesn't involve installing any potentially unwanted software. Here's a powershell answer:

New-ItemProperty HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Taskband -Name "NumThumbnails" -Value 0 -PropertyType "DWord"

Then restart explorer:

ps explorer | kill

Thumbnails will be replaced with a window list:

enter image description here

  • not working, maybe because my Windows is better than yours hahaha just kidding, if it was better it should do what I need. – user33276346 Jun 15 '18 at 23:29
  • @user33276346 what happens after you run each command? 'Not working' doesn't really help anyone. – mikemaccana Jun 18 '18 at 9:43
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    added the value, the command says it is already there, restarted explorer, seen it restart, the preview is still there, laughing at me :) maybe windows had some updates. – adrianTNT Nov 15 '18 at 11:47
  • It doesn't work for me either. I'm on the "April" version of Windows 10. The Powershell script executed correctly and the entry is present in the Registry editor. Explorer restarted correctly. I've also restarted the computer, with Hibernate off. But the evil previews (tiny screenshots) are still glaring at me when I hover over open windows on the taskbar, such as an explorer window or Firefox. Anything else I could try? – Cerberus Jan 2 '19 at 15:42

You need to edit the registry. Set NumThumbnails to 1 (0 doesn't work in Windows 10)


If NumThumbnails is set to 1, if more than one instance of a program is open, the taskbar thumbnails won't show up. Instead they appear stacked.

However, when a single instance of a program is running, the thumbnail still shows up.

I got the answer from this topic https://answers.microsoft.com/en-us/windows/forum/windows_10-start/windows-10-taskbar-thumbnails-turn-them-off-how/d843e6dc-33e9-4811-b6bf-3850de6feff9.

  • 2
    External links can break or be unavailable, in which case your answer would not be useful. Please include the essential information within your answer and use the link for attribution and further reading. Thanks. – fixer1234 Aug 5 '19 at 0:08
  • I updated it already. – Vuongg Aug 5 '19 at 3:41
  • 1
    You referenced the specific portion of the answer that helped you from a reply on that linked post? I think you still need to be more clear what exactly you did per that link to resolve because even the quoted content you quoted is still not clear. It needs to be clear what solution you implemented so even if that link goes away, the content you reference quote still is very clear. Be sure of that and confirm your solution does not already exist from another answer on this post and you are good-to-go. What do I know tho, I'm just a dumb%$&, meep meep!! This [...] is what man? – Pimp Juice IT Aug 5 '19 at 4:00
  • [...] is another link, please click on the link and see what happens, just about the problem knowledge deeply. Do you mean that I need to mention all of quote in any links of the real original instead quoting what is exact answer? It's already clear about the solution related to NumThumbnails. – Vuongg Aug 5 '19 at 4:21
  • 1
    Thanks for the edit. In general, just imagine that the link broke. The reader should still be able to take the action described in the answer to solve the problem. If important context was in the broken link, the answer becomes more of a hint (or tease), that is better suited to a comment, or can be confusing. Ideally, the answer should be a complete, self-contained, actionable solution, and the link attributes credit, and can provide supplemental information. – fixer1234 Aug 5 '19 at 19:24

Maybe the following will be useful for somebody - thumbnail preview will be replaced with list of windows in case that more than one instance has been opened. Please see examples below with Explorer windows tested on Windows 10 Enterprise 1903 (18362.239)

One Explorer window opened
Two Explorer windows opened
Five Explorer windows opened

  • So how does one achieve this effect? What's your answer? Is it different than other answers already posted here, specifically an answer by @Vuong? – gronostaj Nov 4 '19 at 6:23
  • @gronostaj, Calm down then see the dates of Vuong's post and mine one. – ThaViper Nov 5 '19 at 8:30
  • Sorry, I didn't notice that. Still, this is not an answer, it doesn't give any clue how to achieve the effect presented on screenshots. I suppose you've applied the registry modification proposed by Anadrol and mikemaccana + Vuong's fix which you figured out on your own. In that case this should be a comment. – gronostaj Nov 5 '19 at 9:47

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