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LSU vs Lenovo.Client.Update (LCU)#

This document outlines the differences between the original LSUClient (LSU) by jantari and the Lenovo.Client.Update (LCU) module in case you need to migrate some existing scripts to use this module.

Feature Comparison#

Feature LSU LCU Notes
Core Update Discovery YES YES Fetch available updates for Lenovo systems
Driver Updates YES YES Install device drivers
BIOS/UEFI Updates YES YES Update system BIOS/UEFI
Firmware Updates YES YES Firmware updates for various components
Silent Installation YES YES Unattended installation support
Custom Repository YES YES Host own update repository
Proxy Support YES YES Web proxy with authentication
Package Extraction YES YES Extract package contents
Proxy Configuration Management YES YES Get/Set proxy and credentials
Signature Verification NO YES Test-LnvSignature - verify package authenticity
Signature Enforcement N/A YES -VerifySignature flag on installation
Skip Signature Check N/A YES -SkipSignatureCheck for testing environments
Certificate Validation N/A YES (Dedicated DLL) Lenovo.CertificateValidation.dll
Update History LIMITED YES (Enhanced) Better history tracking

Command Comparison#

Quick Reference: Commands#

Migrated from LSU (6 commands)#

All work identically, just renamed:

New to LCU (6 commands)#

Core Commands (Unchanged)#

These commands work the same in both LSU and LCU:

Get-LnvUpdate / Get-LSUpdate 
# Original LSU
$updates = Get-LSUpdate
$updates = Get-LSUpdate -Model "20LS" -All

# LCU (fully compatible)
$updates = Get-LnvUpdate
$updates = Get-LnvUpdate -Model "20LS" -All
Save-LnvUpdate / Save-LSUpdate 
# Original LSU
$updates | Save-LSUpdate -Path "C:\Updates" -ShowProgress

# LCU (compatible)
$updates | Save-LnvUpdate -Path "C:\Updates" -ShowProgress
Install-LnvUpdate / Install-LSUpdate 
# Original LSU
$updates | Install-LSUpdate -Verbose

# LCU (compatible)
$updates | Install-LnvUpdate -Verbose
Get-LnvUpdateConfiguration / Get-LSUpdateConfiguration 
# Original LSU
$config = Get-LSUpdateConfiguration

# LCU
$config = Get-LnvUpdateConfiguration
Set-LnvUpdateConfiguration / Set-LSUpdateConfiguration 
# Original LSU
Set-LSUpdateConfiguration -Proxy "http://proxy.com:8080"

# LCU
Set-LnvUpdateConfiguration -Proxy "http://proxy.com:8080"
Expand-LnvUpdate 
# Original LSU
$updates = Get-LSUpdate
$updates | Save-LSUpdate -Path C:\Packages
$updates | Expand-LSUpdate -Path C:\Packages

# LCU
$updates = Get-LnvUpdate
$updates | Save-LnvUpdate -Path C:\Packages
$updates | Expand-LnvUpdate -Path C:\Packages

# Or use Get-LnvDownload with -Expand
Get-LnvDownload -MachineType 21N2 -RepositoryFolder "C:\Repo" -Expand

New Commands in LCU — Detailed Examples#

Get-LnvDownload – Download and expand packages by machine type

NEW - Downloads current updates for a specified Machine Type to a specified local folder with an option to expand the packages. This cmdlet was migrated from the Lenovo.Client.Scripting module and will be maintained in this module going forward.

# LCU (NEW)
Get-LnvDownload -MachineType 21N2 -RepositoryFolder "C:\Repo" -Expand
Get-LnvUpdateHistory – View update installation history

NEW - Get update install history:

# LCU (NEW)
Get-LnvUpdateHistory | Where-Object { $_.InstallDate -gt (Get-Date).AddDays(-30) }
Get-LnvUpdateSummary – Get system update status

NEW - Get update status summary:

# LCU (NEW)
Get-LnvUpdateSummary
Add-LnvUpdateHist – Manually record updates

NEW - Manually record updates:

# LCU (NEW)
Add-LnvUpdateHist -Title "Custom Update" -InstallDate (Get-Date) -Result "Success"
Get-LnvUpdatesRepo – Create a local update repository

NEW - Create a repository of updates in the style of Update Retriever using the machine type of the running system. This cmdlet was migrated from the Lenovo.Client.Scripting Module and will be maintained in the LCU module going forward.

# LCU (NEW)
Get-LnvUpdatesRepo -RepositoryPath 'C:\Lenovo_Repository' -PackageTypes '1,2' -RebootTypes '0,3'

Parameter & Feature Enhancements#

Security Features (NEW to LCU)#

Install-LnvUpdate now includes signature verification and security controls:

# Verify signatures before installation
$updates | Install-LnvUpdate -VerifySignature

# Skip signature verification (testing only)
$updates | Install-LnvUpdate -SkipSignatureCheck

# Dedicated signature verification function
$updates | Test-LnvSignature
Security Parameters
Parameter LSU LCU Purpose
VerifySignature NO YES Enforce digital signature verification before installation
SkipSignatureCheck NO YES Bypass verification for testing (not recommended for production)
Component LSU LCU Purpose
Lenovo.CertificateValidation.dll N/A YES Enhanced cryptographic certificate validation

Tracking & Logging Features (NEW to LCU)#

Install-LnvUpdate can export installation data to WMI for compliance tracking:

$updates | Install-LnvUpdate -ExportToWMI -Verbose

Get-LnvUpdate provides enhanced logging capabilities:

# Create a logfile in the default location
$updates = Get-LnvUpdate -LogFile

# Create a logfile in a custom location
$updates = Get-LnvUpdate -LogPath "C:\Logs\updates.log"

# Modify package status
$updates = Get-LnvUpdate -StatusMode "Approved"
Logging & Tracking Parameters
Parameter Command LSU LCU Purpose
ExportToWMI Install-LnvUpdate NO YES Export installation info to WMI for audit/tracking
SaveBIOSUpdateInfoToRegistry Install-LnvUpdate YES YES Record BIOS updates in registry
-LogFile Get-LnvUpdate NO YES Create logfile in default path (C:\ProgramData\Lenovo\...)
-LogPath Get-LnvUpdate NO YES Create logfile in specified custom path
-StatusMode Get-LnvUpdate NO YES Change the status of retrieved packages

Complete Parameter Reference#

Install-LnvUpdate – All Parameters
Parameter LSU LCU Purpose
Package YES YES Update package to install
Path YES YES Downloaded package location
Proxy YES YES Proxy server URL
ProxyCredential YES YES Proxy authentication
SaveBIOSUpdateInfoToRegistry YES YES Record BIOS update in registry
VerifySignature NO YES NEW: Verify package signatures
SkipSignatureCheck NO YES NEW: Bypass signature verification
ExportToWMI NO YES NEW: Export to WMI for tracking
Get-LnvUpdate – All Parameters
Parameter LSU LCU Purpose
Model YES YES Computer model to target
All YES YES Return all packages
Proxy YES YES Proxy server
Repository YES YES Custom repository URL
IncludePhantomDevices YES YES Include offline devices
MachineCharacteristicsOverride YES YES Override system info
NoTestApplicable YES YES Skip applicability checks
NoTestInstalled YES YES Skip installation checks
ScratchDirectory YES YES Temp folder for downloads
-StatusMode NO YES NEW: Change package status
-LogPath NO YES NEW: Custom logfile path
-LogFile NO YES NEW: Create logfile automatically