Windows Store and PowerShell doesn't work (or exist?)

So i have another problem.

I'm using built-in Admin so i enabled User Access Control: Admin Approval Mode For built in Administrator account and edited HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\UIPI\Default as 0x00000001 (1) to be able to use metro apps on built-in Admin.
Maybe it should be 0x00000001(1) (without space)?

I wanted to use some apps from Store, but it seems that i dont have it (?). It doesn't show as tile or in "All apps" tiles.
Using advice from this forum:
http://www.eightforums.com/tutorials/19529-store-restore-missing-tile-start-screen-windows-8-a.html
I added this shortcut, but at the beginning it was shortcut to nothing (white icon)
After reboot its "ok" - store icon is showing and store is showing as a tile
However it still doesnt start, clicking on tile shows desktop and nothing else happens (however on left hidden bar store is showing as running)
PS. Similar thing happens to Camera app (didnt have other metro apps as i wouldn't use preinstalled ones so i deleted which i could).

Second problem is that as stated here (Windows App Store doesn't load after 8.1 Upgrade v. 2 (Also Works for Windows 10!) - OUC1TOO - Site Home - TechNet Blogs) if Store doesnt open i can try to fix it using cmd command powershell -ExecutionPolicy Unrestricted Add-AppxPackage -DisableDevelopmentMode -Register $Env:SystemRoot\WinStore\AppxManifest.xml
However after that i'm getting 'powershell' is not recognized as an internal or external command,
operable program or batch file.
And trying to check it versions (Get-Host, $PSVersionTable or $PSVersionTable.PSVersion), gives me the same output, but with used command name as not recognized

Someone can help me with it?

EDIT: I added View attachment CBS.log maybe it will help