After successfully configuring HVRemote tool and passing its diagnostic checks, Windows 7 Professional (SP1) still fails to connect to Server 2012 R2's Hyper-V Manager with the generic error message: "The operation on computer '{Computer Name}' failed.". This persists despite previous successful connections to non-R2 Server 2012 instances.

The root cause typically stems from credential delegation issues between Windows 7's NTLM implementation and Server 2012 R2's default Kerberos requirements. Run this PowerShell command on the Server 2012 R2 host to verify:

Get-Item WSMan:\localhost\Service\Auth | Select-Object *

Key parameters should include:

Basic       : true
Kerberos    : true
Negotiate   : true
CredSSP     : false

For Windows 7 clients, enable Credential Security Support Provider (CredSSP) with these commands:

# On Windows 7 client:
Enable-WSManCredSSP -Role Client -DelegateComputer "hypervserver.domain.com"

# On Server 2012 R2:
Enable-WSManCredSSP -Role Server

Then modify your connection command to include authentication specification:

Connect-VIServer -Server hypervserver.domain.com -Credential (Get-Credential) -Authentication CredSSP

Ensure these ports are open on Server 2012 R2:

netsh advfirewall firewall add rule name="Hyper-V Remote Management" dir=in action=allow protocol=TCP localport=2179,80,443,6600

Install at least WMF 3.0 on Windows 7 with this silent install command:

wusa.exe Windows6.1-KB2506143-x64.msu /quiet /norestart

Check these specific event logs when errors occur:

# Hyper-V-VMMS logs:
Get-WinEvent -LogName "Microsoft-Windows-Hyper-V-VMMS-Admin"

# WS-Management logs:
Get-WinEvent -LogName "Microsoft-Windows-WinRM/Operational" | Where-Object {$_.LevelDisplayName -eq "Error"}

If persistent issues remain, consider these approaches:

# Using PowerShell Direct:
Enter-PSSession -VMName "TargetVM" -Credential (Get-Credential)

# Via Windows Admin Center gateway:
Install-Module -Name Microsoft.WindowsAdminCenter -Force -AllowClobber

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Many administrators face challenges when attempting to manage Hyper-V on Windows Server 2012 R2 from a Windows 7 client. While Microsoft's HVRemote tool helps configure the necessary permissions, connection failures still occur with vague error messages like "The operation on computer '{Computer Name}' failed."

Before diving into troubleshooting, ensure these fundamental requirements are met:

# PowerShell command to verify WS-Management service
Get-Service WinRM

The service should be running on both machines. Additionally, confirm:

• Windows 7 Professional SP1 (fully updated)
• Hyper-V role installed on Server 2012 R2
• Proper firewall rules configured

These settings often get overlooked during setup:

# Enable PowerShell Remoting on Server 2012 R2
Enable-PSRemoting -Force

# Configure WinRM for HTTPS
winrm quickconfig -transport:https

For Windows 7 clients, you might need to install the Remote Server Administration Tools (RSAT):

# Optional: Install Hyper-V Management Tools on Windows 7
dism /online /enable-feature /featurename:Microsoft-Hyper-V-Management-Client

When basic checks pass but connections still fail:

1. Verify DNS resolution works in both directions
2. Check CredSSP settings if using double-hop authentication
3. Examine security logs for authentication failures

# Test basic connectivity
Test-WSMan -ComputerName yourserver.domain.com

# Check firewall rules
netsh advfirewall firewall show rule name=all | find "WinRM"

If direct management continues to fail, consider these workarounds:

• Use PowerShell Direct for local VM management
• Implement a jump server running Windows 10/11
• Deploy Windows Admin Center as a web-based alternative

# Example PowerShell Direct command
Enter-PSSession -VMName "YourVM" -Credential (Get-Credential)

Before giving up, verify these often-missed items:

1. Computer accounts in the "Hyper-V Administrators" group
2. Correct delegation settings if using constrained delegation
3. Time synchronization between client and server