Windows Event ID 1753 – RPC/Endpoint Mapper: The Endpoint Mapper Database Entry Could Not Be Created

Start by examining the full event details and verifying RPC service health:

1. Open Event Viewer → Windows Logs → System
2. Filter for Event ID 1753 and examine the event description for specific error codes
3. Check the RPC Endpoint Mapper service status:

Get-Service -Name "RpcEptMapper" | Format-List *
Get-Service -Name "RpcSs" | Format-List *

4. Verify RPC services are running and restart if necessary:

Restart-Service -Name "RpcEptMapper" -Force
Restart-Service -Name "RpcSs" -Force

5. Check for related events in the Application and Security logs that might indicate the failing service

Examine network settings and firewall rules that may block RPC communications:

1. Check the RPC dynamic port range configuration:

netsh int ipv4 show dynamicport tcp
netsh int ipv4 show dynamicport udp

2. Verify Windows Firewall is not blocking RPC traffic:

Get-NetFirewallRule -DisplayGroup "Remote Procedure Call*" | Format-Table DisplayName, Enabled, Direction

3. Test RPC connectivity to the local endpoint mapper:

rpcping -t ncacn_ip_tcp -s localhost -e 135

4. Check network adapter configuration and DNS resolution:

Get-NetAdapter | Where-Object Status -eq "Up" | Get-NetIPConfiguration

5. If in a domain environment, test domain controller connectivity:

nltest /dsgetdc:$env:USERDNSDOMAIN

Clear and rebuild the endpoint mapper database to resolve corruption issues:

1. Stop dependent services and the RPC Endpoint Mapper:

Stop-Service -Name "RpcEptMapper" -Force
Stop-Service -Name "RpcSs" -Force

2. Clear the endpoint mapper database cache:

Remove-Item -Path "$env:SystemRoot\System32\epmapper.dat" -Force -ErrorAction SilentlyContinue

3. Check and repair RPC registry entries:

$rpcKey = "HKLM:\SOFTWARE\Microsoft\Rpc"
Get-ChildItem -Path $rpcKey -Recurse | Test-Path

4. Restart the RPC services in the correct order:

Start-Service -Name "RpcSs"
Start-Sleep -Seconds 5
Start-Service -Name "RpcEptMapper"

5. Verify the endpoint mapper is accepting registrations:

Get-WinEvent -FilterHashtable @{LogName='System'; Id=1753} -MaxEvents 5 | Format-Table TimeCreated, Id, LevelDisplayName

Investigate system resource constraints that may prevent endpoint registration:

1. Monitor system performance during endpoint mapper failures:

Get-Counter "\Process(*)\Handle Count", "\Memory\Available MBytes", "\Processor(_Total)\% Processor Time" -SampleInterval 5 -MaxSamples 12

2. Check for memory pressure and handle exhaustion:

Get-Process | Sort-Object HandleCount -Descending | Select-Object -First 10 Name, HandleCount, WorkingSet

3. Examine RPC performance counters:

Get-Counter "\RPC/Remote Calls\*" -ErrorAction SilentlyContinue

4. Review system event logs for resource-related errors:

Get-WinEvent -FilterHashtable @{LogName='System'; Level=2,3; StartTime=(Get-Date).AddHours(-2)} | Where-Object {$_.Message -match "resource|memory|handle"}

5. Check disk space on system drive and increase virtual memory if needed:

Get-WmiObject -Class Win32_LogicalDisk | Select-Object DeviceID, @{Name="FreeSpaceGB";Expression={[math]::Round($_.FreeSpace/1GB,2)}}

Perform deep system analysis and repair corrupted RPC components:

1. Backup and examine critical RPC registry keys:

$regPaths = @(
    "HKLM:\SOFTWARE\Microsoft\Rpc",
    "HKLM:\SYSTEM\CurrentControlSet\Services\RpcEptMapper",
    "HKLM:\SYSTEM\CurrentControlSet\Services\RpcSs"
)
foreach ($path in $regPaths) {
    if (Test-Path $path) {
        reg export $path "C:\temp\$(Split-Path $path -Leaf)_backup.reg"
    }
}

2. Run system file checker to repair corrupted RPC components:

sfc /scannow
Dism /Online /Cleanup-Image /RestoreHealth

3. Check for and repair Windows component store corruption:

Dism /Online /Cleanup-Image /CheckHealth
Dism /Online /Cleanup-Image /ScanHealth

4. Analyze RPC endpoint mapper service dependencies:

$service = Get-WmiObject -Class Win32_Service -Filter "Name='RpcEptMapper'"
$service.ServicesDependedOn | ForEach-Object { Get-Service -Name $_.Name }

5. Enable detailed RPC logging for troubleshooting:

reg add "HKLM\SOFTWARE\Microsoft\Rpc\ClientProtocols" /v "EnableDCOMHTTP" /t REG_DWORD /d 1 /f
reg add "HKLM\SOFTWARE\Microsoft\Rpc" /v "EnableDCOMHTTP" /t REG_DWORD /d 1 /f