Problem
You want to determine whether a specific hotfix is installed on a system.
Solution
To retrieve a list of hotfixes applied to the system, use the Win32_ QuickfixEngineering WMI class: PS >GetWmiObject Win32_QuickfixEngineering Filter "HotFixID='KB925228'"
Description : Windows PowerShell(TM) 1.0 FixComments : HotFixID : KB925228 Install Date : InstalledBy : InstalledOn : Name : ServicePackInEffect : SP3 Status :
To determine whether a specific fix is applied, use the TestHotfixInstallation script provided in Example 245:
PS >TestHotfixInstallation KB925228 LEEDESK True PS >TestHotfixInstallation KB92522228 LEEDESK False
Discussion
Example 245 lets you determine whether a hotfix is installed on a specific system. It uses the Win32_QuickfixEngineering WMI class to retrieve this information.
Example 245. TestHotfixInstallation.ps1
############################################################################## ## ## TestHotfixInstallation.ps1 ## ## Determine if a hotfix is installed on a computer ## ## ie: ## ## PS >TestHotfixInstallation KB925228 LEEDESK ## True ## ##############################################################################
param( $hotfix = $(throw "Please specify a hotfix ID"), $computer = "." )
## Create the WMI query to determine if the hotfix is installed $filter = "HotFixID='$hotfix'" $results = GetWmiObject Win32_QuickfixEngineering `
Filter $filter Computer $computer
## Return the results as a boolean, which tells us if the hotfix is installed [bool] $results
