SirBond

Its a bracket to reinforce the GPU to prevent/help against sagging,  this is just a generic photo

I think you need pro for sandbox. Are you using windows 10 pro or home?

The sandbox app is not enabled by default and require Windows 10 Pro.
You need to enable it in Control Panel > Programs and Features > Turn Windows features on or off

You may need to enable hardware virtualisation in your BIOS before you can enable sandbox in Windows.
Windows Central guide

You need Windows10 Pro or better. 
You must enable Hyper V, then restart PC. 
Then you can enable the Sandbox. 
 
However, if it won't appear, open notepad and copy this inside, then save it as a .bat file on the desktop and run it. 
 
@echo off
echo Checking for permissions
>nul 2>&1 "%SYSTEMROOT%\system32\cacls.exe" "%SYSTEMROOT%\system32\config\system"
echo Permission check result: %errorlevel%
REM --> If error flag set, we do not have admin.
if '%errorlevel%' NEQ '0' (
echo Requesting administrative privileges...
goto UACPrompt
) else ( goto gotAdmin )
:UACPrompt
echo Set UAC = CreateObject^("Shell.Application"^) > "%temp%\getadmin.vbs"
echo UAC.ShellExecute "%~s0", "", "", "runas", 1 >> "%temp%\getadmin.vbs"
echo Running created temporary "%temp%\getadmin.vbs"
timeout /T 2
"%temp%\getadmin.vbs"
exit /B
:gotAdmin
if exist "%temp%\getadmin.vbs" ( del "%temp%\getadmin.vbs" )
pushd "%CD%"
CD /D "%~dp0" 
echo Batch was successfully started with admin privileges
echo .
cls
Title Sandbox Installer
pushd "%~dp0"
dir /b %SystemRoot%\servicing\Packages\*Containers*.mum >sandbox.txt
for /f %%i in ('findstr /i . sandbox.txt 2^>nul') do dism /online /norestart /add-package:"%SystemRoot%\servicing\Packages\%%i"
del sandbox.txt
Dism /online /enable-feature /featurename:Containers-DisposableClientVM /LimitAccess /ALL
pause