$pc = Read-Host "Enter the remote computer name to disable secure desktop";

Invoke-Command -ComputerName $pc -Scriptblock {
    Set-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" -Name "PromptOnSecureDesktop" -Value 0 -Force;
    };

$remoteAssist = "$Env:windir\system32\quickassist.exe";
Start-Process $remoteAssist -Wait;
Write-Host "Your Remote assist session has ended" -ForegroundColor Red;

Invoke-Command -ComputerName $pc -Scriptblock {
    Set-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" -Name "PromptOnSecureDesktop"  -Value 1 -Force;
    };