Explorer "Close all windows" completely stopped working

All of a sudden, when I have multiple File Explorer windows open, right clicking the "Close All Windows" button does nothing at all. This started about two weeks ago. I've run SFC full and it found no errors to speak of (I replaced a lock screen image that I hated, so the hash didn't match).

I've also run Kasperski AV full and without exclusions, nothing non-trivial. I ran Kasperski's vulnerability scan, but the only thing it found was an out of date Firefox (which I fixed).

Does anyone have any suggestions as to how to proceed, please? Thanks!

Windows version: 64-bit Pro 1909

Hello @Thenin,

I know you have already run SFC, but please perform the following . . .

 SFC and RestoreHealth

[1] Press the Win + X keys together > Command Prompt (Admin).
[2] Highlight ALL the commands below.

IMPORTANT:

• It is recommended when running SFC that Fast Startup is turned OFF [ Turn it back ON when finished ] => How to Turn On or Off Fast Startup in Windows 10
  
  
• If SFC finds any ERRORS that it can NOT repair, run SFC again upto 3 more times, Restarting after each to allow any pending actions to be implemented.
  
  
• DISM will initially try and Repair ANY Corrupted or Missing files using the Component Store.
  If this is NOT possible, DISM will use Windows Update. Therefore, Internet access is required.
  If you are NOT connected to the Internet, you will receive a Error: 0x800f081f.

[3] Press the Ctrl + C keys together.
[4] Right-click inside the Administrator: Command Prompt Window > Paste.
[5] Press Enter.

Code:

sfc /scannow
Dism /Online /Cleanup-Image /RestoreHealth
sfc /scannow

• When the above has finished processing . . .

[6] Right-click on the title bar of the Administrator: Command Prompt Window > Edit > Select All.
[7] Right-click on the title bar of the Administrator: Command Prompt Window again > Edit > Copy.

• Paste the results into your post using the [CODE] tags . . .

[8] In your post, click the Hashtag icon #.
[9] Click INSIDE the [CODE]Here[CODE] tags and press the Ctrl + V keys together.

• In your post it will look like this . . .

Code:

<<< Results here >>>

 SFC Error Report

However, if there are STILL SFC ERRORS . . .

[1] Press the Win + X keys together > Command Prompt (Admin).
[2] Highlight the command below.

NOTE:

If you have a Relocated Desktop, then change the %UserProfile% part of the Command below to the actual path of the Relocated Desktop folder.

[3] Press the Ctrl + C keys together.
[4] Right-click inside the Administrator: Command Prompt Window > Paste.
[5] Press Enter.

Code:

findstr /c:"[SR]" %windir%\Logs\CBS\CBS.log > "%UserProfile%\Desktop\SFC_Details.log"

• This will create a SFC_Details.log file on the Desktop.

EITHER:

Copy & Paste the results into your post using the [CODE] tags . . .

[1] Open the SFC_Details.log file in Notepad.
[2] Press the Ctrl + A keys together.
[3] Press the Ctrl + C keys together.
[4] In your post, click the Hashtag icon #.
[5] Click INSIDE the [CODE]Here[CODE] tags and press the Ctrl + V keys together.

• In your post it will look like this . . .

Code:

<<< Results Here >>>

OR:

UPLOAD the file => How to Upload and Post Screenshots and Files at Ten Forums.

---

I hope this helps.

right clicking the "Close All Windows" button does nothing at all

- just wondering- what were you expecting this to do?

I assume you're referring to the one below the jump list.

Well, the post says 'button':

a. open multiiple windows of the same type.
Win key + e - repeat 3 times say.
Rt click on the f.explorer icon on the taskbar to display the jump list.
That's what I've shown.

Why should right-clicking (as the OP describes) on it do anything?

See my post #3.

At present further clarification from Thenin - indeed any sort of response- is needed. No point going further with this with fruitless speculation.

Thanks. And just for absolute clarification, can you confirm you're left clicking it please?

Try creating a new user for test purposes. Log in as that user, and advise if it behaves differently.
(This differentiates user profile-specific issues from more general ones).

What happens when you left click the close button on the thumbnail preview?