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I noticed that what looks like a tooltip saying "Increase Indent" is floating homeless on my screen. Here it is with the edge of the browser window beneath it:

enter image description here

It has attained nearly infinite Z-order and sits above anything else I can move around, even Task Manager. (It does not superimpose over the lock screen)

How can I figure out which program owns this, so I can terminate it? I'd prefer to do this in a minimally invasive way - ie, not just reboot.

I have already closed certain applications just by guesswork but didn't luck into the offender. (Possibly, since this seems to be a bug, closed applications didn't actually clean up properly).

Searching for "increase indent" specifically floating like this didn't turn anything up, but I was hopeful this could be a commonly known issue.

I imagine there could be some utility (built in to Windows, or 3rd party) which might let you click on any UI element and identify its process?

Edit: I found the source of the tooltip, thanks to the answer below, which was a web app running in Chrome:

enter image description here

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    Have you had any text editors or word processors open? There is an Increase Indent option in Microsoft Word and Google Docs, but neither of their tooltips look like that. It may be from something similar.
    – MC10
    Commented Apr 22, 2020 at 21:20
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    Try Show Desktop and back again
    – DavidPostill ♦
    Commented Apr 22, 2020 at 21:21
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    I have had this issue before, every time I've had the issues is because a hoverable's unhover function didn't run. Just hovering over whatever you hovered over and unhovering fixes it. This is like when you get stuck keys so you press the offending button to get the unpress function to run.
    – user319780
    Commented Apr 23, 2020 at 9:51
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    @CamilaHunter I have definitely seen that kind of thing before also. But in this case no amount of badgering the thing with the mouse would affect it.
    – StayOnTarget
    Commented Apr 23, 2020 at 10:25
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    Off topic but it really bothers me that "Indent" is capitalised here. In my experience, that is not the Windows convention for tooltips. If you ever work out which app is responsible, please ask its authors to fix this ;)
    – Asteroids With Wings
    Commented Apr 23, 2020 at 12:10

4 Answers 4

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You are most likely experiencing a Chrome bug that results in undismissable tooltips.

Basically, if you hover over something on a webpage and then your mouse moves outside the window in an unexpected way (such as minimizing the window), the tooltip will appear after the window disappeared, and there is no way to dismiss the tooltip (since the source window no longer gets mouse move messages, and as far as it's concerned, you're still hovering).

To get rid of the tooltip, you can

  1. Find the tab it came from and just move your mouse around. The tooltip should disappear. (Unfortuantely, there's no easy way to determine which tab the tooltip came from, so you'll have to guess. It has no direct association in the window hierarchy; its parent is the desktop window.)
  2. If you can get the tooltip's HWND, you can send it WM_CLOSE and it will go away. (see below)
  3. Exit Chrome (or other offending app)

Note that this bug affects software based on Chrome as well, such as Blink-based browsers (Edge and Opera) and things built on Electron (Slack and hundreds of others).

To answer the question itself, you can find the process that owns the tooltip by using a debugging tool like Spy++ or WinCheat.

Drag the window picker tool over the tooltip and it will show you the window's details, including the owning process.

using WinCheat

If you then go to the Actions tab, you can send the tooltip window a WM_CLOSE message and it will go away. (Be careful with this tool -- great power, great responsibility. Apps may not expect windows to be closed out from under them. Doing this doesn't appear to make Chrome crash.)

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    This is exactly what happened. Thanks to this answer I discovered the source of the tooltip - which is a Chrome web app I use often. I can't yet get it to reproduce again but I don't know exactly what caused it in the first place, I suspect another program coming up and stealing focus.
    – StayOnTarget
    Commented Apr 24, 2020 at 12:16
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    This is a bug that happens in any Chromium-based browser, not only Chrome; I see it all the time in Vivaldi. The only way to dismiss the tooltip is either to exit the browser completely, or to hover over all the open tabs and windows until the correct one is found and the tooltip goes away.
    – user9528
    Commented Apr 24, 2020 at 14:12
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I noticed that what looks like a tooltip saying "Increase Indent" is floating homeless on my screen.

There are 2 possibilities:

  1. A glitch that hasn't been redrawn correctly by the underlying window manager code

  2. A real Window that cannot be moved/closed

A glitch that hasn't been redrawn correctly

  • to remove it toggle the Show Desktop button on the far right of the taskbar.

How can I remove an unwanted fragment of old GUI on my screen? (Windows 7) - Super User shows some other possible solutions:

  • change the theme of your windows from Aero to Classic and then back to Aero again.
  • Start Menu > Shut Down > Switch User, On Welcome screen just log back in

As per comments you can also try:

  • Restarting Windows Explorer will do the trick too, most of the time. If not, restart dwm.exe

A real Window that cannot be moved/closed

You can use Process Explorer's "Find Window's Process" feature (the crosshairs on the toolbar of the Process Explorer window). Click and drag it over the window you want to identify, and Process Explorer will highlight the process it belongs to.

Source I can't remove a tiny window, answer by cyanic

When you know which process the windows belongs to you can choose to terminate that process by using the Task Manager.

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    Restarting Windows Explorer will do the trick too, most of the time. If not, restart dwm.exe.
    – user1019780
    Commented Apr 23, 2020 at 7:48
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    @Didier I only had this problem once but if it happens again I may try that just to see. Thx
    – StayOnTarget
    Commented Apr 23, 2020 at 10:26
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    Hopefully, you won't have to... :-)
    – user1019780
    Commented Apr 23, 2020 at 10:50
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    I'm routinely seeing those (different words, but the label looks the same) in RDP sessions.
    – Andrew Savinykh
    Commented Apr 23, 2020 at 22:18
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    Process Explorer's Find Window Process may not help with things like tooltips which often are windows that are not even hit-test visible to the mouse on purpose.
    – Joey
    Commented Apr 24, 2020 at 10:18
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Use Spy ++ (SPYXX.EXE) to find this buggy program. https://docs.microsoft.com/en-us/visualstudio/debugger/introducing-spy-increment

This article should help you: https://docs.microsoft.com/en-us/visualstudio/debugger/how-to-use-the-finder-tool

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    answers should be self contained, you should try to put at least a summary of the content in the link, in case e.g. the link goes dead
    – somebody
    Commented Apr 25, 2020 at 2:08
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On one occasion using the Process Explorer tip mentioned in another answer it turned out to be Visual Studio Code that owned the floater. Switching to that app & moving the mouse around cleared it up.

The Process Explorer tool worked perfectly.

I've added this as an answer because it differs from the accepted answer & some other comments about Google Chrome being the likely culprit.

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