The screenshot was taken of my computer. What AV do you think I’m using ???
j2ee if you are not a troll, stop behaving like one.
I have saw the possible solutions you guys talked about in the other post and I also posted what I found in this post, no need to discuss how it could be solved. Many people in the other post had already pointed out no matter what they do it would be either cannot be solved or the problem would come back sometimes later anyway. I would not want to keep spending time to solve it again and again.
The problem is why Avast never really solves this problem instead of asking me why I bring this up. If you guys know the management in Avast you need to seriously talk with them.
@bob3160 Pls stop arguing.@j2ee is left avast! and installed a new Free AV.And it is no matter that every problem related to Avast!.We are using avast! and windows10 without any issues 
You need to learn what arguing is. I was trying to help even if he apparently doesn’t know what help or an answer is.
Sorry for the word" arguing"@bob3160
We don’t know exactly how Avast screw up Windows 10, I am not surprised some users would not have problem while other have problem. The key is uninstalling Avast solves it if someone has problem.
One question-have you tried the repair option i posted on Reply #2
It’s been explain in numerous ways that this problem is a Microsoft Windows 10 problem.
Stop your continued trolling of this forum. >:(
I am very calm and again prove your argument with any link, but better has the word “Avast” in the link content so at least it is a link related to Avast instead of a totally not related issue. I am opened to discuss if you can bring any prove.
Do you have a problem understanding english???
You seem not to be able to answer any questions here. 
Maybe you can explain your problem better in your own language ???
https://forum.avast.com/index.php?board=21.0
Hope this will help http://www.thewindowsclub.com/cortana-taskbar-search-not-working-in-windows-10 &http://www.thewindowsclub.com/start-menu-does-not-open-windows-10
I think it is you cannot understand what I am saying
I said
show us any link to prove it is a Windows problem causing Avast screw up taskbar related stuff
You keep saying it is Windows problem, but you have no link to prove it.
I have link to show you uninstall Avast work, and many people in the other post in this forum also proves uninstall Avast works:
https://www.reddit.com/r/Windows10/comments/3ghpfp/unable_to_open_start_menu_uninstall_avast/
Your links don’t mention Avast at all
I don’t know how many times need to say this, even the result is similar taskbar not working, the cause is not the same. We are discussing Avast is the cause and uninstall Avast 100% solve it, while your link is talking about Windows itself somehow has similar problem but people don’t have Avast.
Ok I don’t know how to make it even more clear:
We are talking about case A:
case A: Avast screws up taskbar, uninstall Avast solve the problem
We are NOT talking about case B which is your two links mention:
case B: People don’t have Avast but Windows itself somehow screw up taskbar, there is no Avast to uninstall but there are other ways to solve it, these ways would not solve case A, I know because I tried.
Create a support ticket:https://support.avast.com/support/home
This is a old post that you show >:(Aug 4, 2015
The problem is never solved, many people in the other posts reported it, then what is the different between old post and new post when the problem is the same and the solution is the same: uninstall Avast works.
Ofcourse it is not solved.
Microsoft is still working on it.
Get the huge clue.
case B: People don't have Avast but Windows itself somehow screw up taskbarNo avast installed and the problem is still there. This clearly shows that it is a Windows problem.
Then why I and many other can solve the problem by uninstall Avast? If the problem is caused by Windows, then even we uninstall Avast then the problem should still be there. May be it is better to describe it as “Avast is not compatible with Windows 10 for some users”?
When you use the Avast Uninstall utility, it reboots you to Safe Mode does it’s removal and reboot to regular mode.
You could simply have Booted into Safe Mode with Networking on your own, not remove Avcast, reboot to regular mode
and your problem would have been solved.
It is the booting into safe mode that fixed the problem.