When attempting to connect to the local Hyper-V server after enabling the Hyper-V feature on Windows 10 Professional (version 1809, build 17763), many users encounter this persistent error:

Error: "An error occurred while attempting to connect to server XX. Check that the Virtual Machine Management service is running and that you are authorized to connect to the server"

First, confirm that all required services are running:

# PowerShell command to check Hyper-V services
Get-Service -Name vmms, vmicheartbeat, vmickvpexchange, vmicrdv, vmicshutdown, vmictimesync | Format-Table -AutoSize

The Virtual Machine Management service (vmms) should show "Running" status. If not, start it with:

Start-Service -Name vmms
Set-Service -Name vmms -StartupType Automatic

Even with services running, permission issues can prevent connection. Verify your account has proper rights:

# Check Hyper-V Administrator group membership
(Get-LocalGroupMember -Name "Hyper-V Administrators").Name

# Add current user if missing
Add-LocalGroupMember -Group "Hyper-V Administrators" -Member $env:USERNAME

Domain-joined machines often face additional authentication hurdles. Try these steps:

# Reset WinRM configuration (may help with local connections)
winrm quickconfig -force
winrm set winrm/config/client '@{TrustedHosts="*"}'

# Check firewall rules for Hyper-V
Get-NetFirewallRule -DisplayGroup "Hyper-V*" | Where-Object {$_.Enabled -ne "True"}

For build 17763 specifically, Microsoft released several fixes. Ensure you have these updates:

• KB4483234 (2019-01 Cumulative Update)
• KB4487044 (2019-02 Servicing Stack Update)

If the GUI fails, try connecting via PowerShell:

# List available VMs
Get-VM

# Alternative connection syntax
Enter-PSSession -ComputerName localhost -ConfigurationName Microsoft.HyperV

When all else fails, completely reinstall Hyper-V components:

# Remove all Hyper-V features
Disable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-All -NoRestart

# Reinstall with management tools
Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All -NoRestart
Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-Management-PowerShell -NoRestart

When attempting to connect to local Hyper-V instances after enabling the feature, users encounter:

Hyper-V Manager "An error occurred while attempting to connect to server XX. 
Check that the Virtual Machine Management service is running 
and that you are authorized to connect to the server

First confirm these critical services are running:

# PowerShell verification command
Get-Service vmms | Select-Object Name, Status, StartType

# Expected output:
Name  Status StartType
----  ------ ---------
vmmms Running Automatic

For domain-joined machines, additional checks are necessary:

# Check firewall rules for Hyper-V
netsh advfirewall firewall show rule name=all | findstr "Hyper-V"

# Verify WS-Management connectivity
Test-WSMan -ComputerName localhost

For build 17763.1 (October 2018 Update):

# Repair Hyper-V components
DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

Run these commands as Administrator:

# Re-register Hyper-V management components
regsvr32 /s %windir%\system32\virtmgmt\vmmservice.dll
regsvr32 /s %windir%\system32\vmmservice.exe

Even on public WiFi, ensure proper network binding:

# Reset network adapters for Hyper-V
Get-NetAdapter | Where InterfaceDescription -like "*Hyper-V*" | Reset-NetAdapter

Try direct WMI connection as fallback:

# PowerShell direct connection
$session = New-CimSession -ComputerName localhost
Get-VM -CimSession $session

Enable verbose logging:

# Event log filtering
Get-WinEvent -LogName "Microsoft-Windows-Hyper-V-VMMS-Admin" | 
Where-Object {$_.LevelDisplayName -eq "Error"} | 
Format-List -Property Message,TimeCreated