Windows 10: My app icons are gone

I was doing some stuff, I installed Free Download Manager, then noticed my app icons disappeared. I've tried everything, update, sfc /scannow, DISM command, cleared thumbnail cache. I've even uninstalled FDM. Nothing seemed to fix it.It's not letting me upload the image, I'll send an image link:https://media.discordapp.net/attachments/1234872711784956057/1373826443171070073/image.png?ex=682bd314&is=682a8194&hm=1c41d14bf7fcfcdf58371156913b7c6eb9dce53ad44ece699970925e84cd891c&=&format=webp&quality=lossless&width=550&height=344

:)

 

Default apps and Microsoft store app icons are gone

All of the default apps like Clock, Settings, Calculator and Microsoft Store app icons are gone and I've tried things like rebuilding icon cache which doesn't work and everything else I can't do because I'm not an admin

The icons are only gone when I search them in the search box and the icons show in the taskbar and the app list but not when I search them in the search box.

 

Why did the startup window get cleared?

I didn't missed any step, the list was gone and gone , even after using lot of programs the programs were not listed in that list.

 

Icons/apps in Windows 10 Start menu are gone.

After I installed HP Solution Center, I rebootted my PC. After the reboot some icons and apps in my Start Menu, like Spotify, all the Microsoft Office apps and the Microsoft E-mail app, are gone. The aren't in my app list either.

I searched in Windows Explore to those programs. I didn't found the Microsoft apps, which are gone. I did found Spotify and the Microsoft Office apps. But I couldn't add those to my Start Menu.

When I try to add an app, to the Start Menu, is in my app list, I can't move it arround or change the size of the Icon.

I hope you know a solution.