Page Comparison

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• Critical Updates: Broadly released fixes for specific problems addressing critical, non-security related bugs.  
• Updates: Broadly released fixes for specific problems addressing non-critical, non-security related bugs.  
• Update Rollups: Cumulative set of hotfixes, security updates, critical updates, and updates packaged together for easy deployment. A rollup generally targets a specific area, such as security, or a specific component, such as Internet Information Services (IIS).  
• Security Updates: Broadly released fixes for specific products, addressing security issues.  
• Service Packs: Cumulative sets of all hotfixes, security updates, critical updates, and updates created since the release of the product. Service packs might also contain a limited number of customer-requested design changes or features.   
• Feature Packs: New feature releases, usually rolled into products at the next release.   
• Definition Updates: Updates to virus or other definition files.
• Upgrades: Windows Upgrade (e.g. Windows 11 22H2)

You can combine classifications by just combining the letters:

• C (Critical Updates) 
• U (Updates) 
• R (Update Rollups) 
• S (Security Updates) 
• E (Service Packs) 
• F (Feature Packs) 
• D (Definition Updates)
• A (Upgrades)

For example

WUInstall.exe /search /criteria "IsInstalled=1" /classification CRSE generates the following output:

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With the /matchfile option you can specify multiple /match parameters.

Just write the desired update matches (regular expressions are supported) into a file and specify this file as the matchfile.

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/nomatchfile is quite the opposite of the /matchfile option: use it if you want to specify multiple /nomatch parameters (if you want to exclude a list of updates).

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 WUInstall.exe /search /releasedate lt:20142022-05-06

You will get following output:

 3 Updates found in total, filtering ...
Listing those where release date lt 20142022-05-06

1. Microsoft Visual Studio 2010 Service Pack 1
 Severity: Unknown
 UpdateClassification - Service Packs
 Product - Visual Studio 2010
 ID: 230b82d1-3abd-471a-a4f9-23f97fb857d9
 Releasedate: 2012-04-05
 Eula Accepted: true

The second way to use this options is to specify a number of days. This If you specify a negative value, this only lists all updates with release date after today minus the given days.
If you specify a positive value (+10) then wuinstall lists all updates that are 10 days or older.

Example:

WUInstall.exe /search /releasedate -+10

This will list all updates which are not older than 10 days:

3 Updates found in total, filtering ...
Listing those with release date afterbefore 20142022-04-26

1. Definition Update for Windows Defender - KB2267602 (Definition 1.173.1428.0)
 Severity: Unknown
 UpdateClassification - Definition Updates
 Product - Windows Defender
 ID: 4f25e1f8-186e-4d0b-b18c-6dab7c081c09
 Releasedate: 20142022-0503-06
 Eula Accepted: true 

/maxUpdateCount number

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