Windows 10: Underlined icon in the taskbar disappear (picture 1) and reappear

It will reappear about 15-20 minute after disappear...

Then for a long while it will disappear again...
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I have expand the tastkbar wider (picture 2) and found that underlined is not disappear but it hiding lower. So I can see underlined if I expand the taskbar!

I don't know why it happen like this ?

Thanks in advance

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My specs: Core i7-6700 | Gigabyte H170-D3HP (BIOS F20g) | Kingston Hyper-X 2133 (4GBX2) | SAMSUNG 850 EVO 250GB | SEASONIC S12II - 520W | Windows10 Pro (1803)(OS build 17134.191)

Monitor 32'' PHILIPS 323E7QDAA/00 - with DVI-D single link cable

All driver are up to date!

:)

 

taskbar icons disappear and then reappear

That could mean there was a change detected which needed to be handled by all your active tasks.

That suggests that the current focus was most likely on the Desktop (e.g. assuming you have a lot of icons on your Desktop). Please try to be sure that Narrator gets focus on things that you are interested
in. Again, it may be necessary to practise using the tools before you actually need to try to understand something that is less clear.

Good luck

Robert

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taskbar icons disappear and then reappear

so I've also discovered that when the taskbar icons disappear my CPU usage goes up to 100% and that it's not just one background process going to 100%, a lot of them go from somewhere between 1% and 0% CPU usage to 15% or something similar, and when I
look in windows problem and reliability reports there are about 100 critical reports of file explorer, so I don't know what that means. Also, I tried setting my projection to duplicate and that helped a bit by making the taskbar icons reappear a bit faster,
but they still disappear, and when the items disappear, also, I think the narrator says "desktop, taskbar: program manager page: desktop, selected, supports multiple selections, over 100 items selected" I'm not sure he says that but it was something along
those lines. Anyway, I hope that helps.

 

taskbar icons no underline

Hello, it is supposed that my accent color will be used to underline the taskbar icons of apps that are running, but for some reason they are not working, i cannot know easily which applications are running or no from my taskbar. Please help.