Windows Event ID 10010 – DistributedCOM: DCOM Server Process Launcher Service Access Denied

Start by examining the event details to identify which DCOM application is experiencing access issues.

1. Open Event Viewer by pressing Win + R, typing eventvwr.msc, and pressing Enter
2. Navigate to Windows Logs → System
3. Filter for Event ID 10010 by right-clicking the System log and selecting Filter Current Log
4. Double-click on a recent Event ID 10010 entry to view details
5. Note the CLSID or APPID mentioned in the event description
6. Use PowerShell to identify the application associated with the CLSID:

Get-WinEvent -FilterHashtable @{LogName='System'; Id=10010} -MaxEvents 5 | ForEach-Object {
    $_.Message | Select-String -Pattern '{[A-F0-9-]+}'
}

Record the CLSID for use in subsequent troubleshooting steps. This identifier helps pinpoint the exact DCOM component causing issues.

Modify DCOM security settings to grant appropriate permissions to the affected user or service account.

1. Press Win + R, type dcomcnfg.exe, and press Enter to open Component Services
2. Navigate to Component Services → Computers → My Computer → DCOM Config
3. Locate the application corresponding to the CLSID from the event (you may need to search by name or CLSID)
4. Right-click the application and select Properties
5. Click the Security tab
6. Under Launch and Activation Permissions, click Edit
7. Add the user account or service experiencing the issue
8. Grant Local Launch and Local Activation permissions
9. Repeat for Access Permissions if necessary
10. Click OK to apply changes
11. Restart the affected service or reboot the system

Restore default DCOM permissions when custom configurations cause widespread access issues.

1. Open an elevated Command Prompt by pressing Win + X and selecting Command Prompt (Admin)
2. Stop the DCOM Server Process Launcher service:

net stop DcomLaunch

3. Reset DCOM permissions using the following PowerShell commands:

# Reset DCOM default authentication level
Set-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Ole" -Name "DefaultAuthenticationLevel" -Value 2

# Reset DCOM default impersonation level
Set-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Ole" -Name "DefaultImpersonationLevel" -Value 2

# Restart DCOM services
Restart-Service -Name "DcomLaunch" -Force
Restart-Service -Name "RpcSs" -Force

4. Verify the services are running:

Get-Service -Name "DcomLaunch", "RpcSs" | Format-Table Name, Status

Examine and resolve service account-related DCOM access problems.

1. Identify which service account is mentioned in the Event ID 10010 details
2. Open Services by pressing Win + R, typing services.msc, and pressing Enter
3. Locate services running under the problematic account
4. Check service account configuration using PowerShell:

# List services and their logon accounts
Get-WmiObject -Class Win32_Service | Where-Object {$_.StartName -like "*username*"} | Select-Object Name, StartName, State

5. Verify the service account has the necessary privileges:

# Check user rights assignments
secedit /export /cfg C:\temp\current_policy.inf
Select-String -Path "C:\temp\current_policy.inf" -Pattern "SeServiceLogonRight"

6. Grant "Log on as a service" right if missing:
7. Open Local Security Policy (secpol.msc)
8. Navigate to Local Policies → User Rights Assignment
9. Double-click Log on as a service
10. Add the service account and click OK
11. Restart the affected services

Clean up temporary files: Remove-Item C:\temp\current_policy.inf -Force

Perform comprehensive analysis of DCOM registry settings and Group Policy impacts.

1. Export current DCOM configuration for backup:

# Backup DCOM registry keys
reg export "HKLM\SOFTWARE\Classes\AppID" "C:\temp\DCOM_AppID_backup.reg"
reg export "HKLM\SOFTWARE\Microsoft\Ole" "C:\temp\DCOM_Ole_backup.reg"

2. Analyze Group Policy settings affecting DCOM:

# Generate Group Policy report
gpresult /h C:\temp\GPReport.html /f

# Check for DCOM-related policies
Get-ChildItem "HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\DCOM" -Recurse -ErrorAction SilentlyContinue

3. Examine DCOM error logs in detail:

# Detailed DCOM event analysis
Get-WinEvent -FilterHashtable @{LogName='System'; Id=10010; StartTime=(Get-Date).AddDays(-7)} | 
ForEach-Object {
    [PSCustomObject]@{
        TimeCreated = $_.TimeCreated
        Message = $_.Message
        ProcessId = $_.ProcessId
        ThreadId = $_.ThreadId
    }
} | Export-Csv -Path "C:\temp\DCOM_Events.csv" -NoTypeInformation

4. Check for corrupted DCOM registrations:

# Verify DCOM application registrations
$DCOMApps = Get-ChildItem "HKLM:\SOFTWARE\Classes\AppID" | ForEach-Object {
    Get-ItemProperty $_.PSPath -ErrorAction SilentlyContinue
}
$DCOMApps | Where-Object {$_.PSChildName -match '{.*}'} | Select-Object PSChildName, '(default)'

5. Re-register DCOM components if corruption is detected:

regsvr32 /s ole32.dll
regsvr32 /s oleaut32.dll