April 2026 security update, Remote Desktop Connection shows new security warnings RDP

Step 1: Open PowerShell (Administrator) 

Step 2: Paste this command 

$registryPath = "HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\Client" 

$name = "RedirectionWarningDialogVersion" 

$value = 1 

if (-not (Test-Path $registryPath)) { 

New-Item -Path $registryPath -Force | Out-Null 

Write-Host "Key created successfully: $registryPath" -ForegroundColor Cyan 

} 

New-ItemProperty -Path $registryPath -Name $name -Value $value -PropertyType DWord -Force | Out-Null 

Write-Host "Configuration applied: $name set to $value." -ForegroundColor Green

Step 3: Reg Edit (Administrator)

Key Path: Software\Policies\Microsoft\Windows NT\Terminal Services\Client

Value Name: RedirectionWarningDialogVersion

Value Type: REG_DWORD

Value Data: 1

Step 4: Open RDP and now warning error should not appear.