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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:

...

Each update belongs to a product (for example Office 20072019/365, Windows 10, Windows 711, Forefront Client Security, ...). It is also possible to filter results of a search (which match the specified criteria) by a product name.

...

This option filters the search result and excludes the given product.

 /match "regexp"

This option filters each update in the result list if the title of an update matches the search string specified with the regexp parameter (in WuInstall Pro, also regular expressions are possible).

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 Searching for updates ... Criteria: IsInstalled=1
Result Code: Succeeded

96 Updates found in total, filtering ...
Listing those matching search expression:  'KB890830'

1. Windows Malicious Software Removal Tool - August 20102022 (KB890830)
 Severity: Unknown
 UpdateClassification - Update Rollups
 Product - Windows 7

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For example, searching for all updates that match "Internet Explorer 811", the Term "Language" or "KB89", you type:

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 Searching for updates ... Criteria: IsInstalled=1
Result Code: Succeeded

96 Updates found in total, filtering ...
Listing those matching search expression:  '(Language|KB89|Internet Explorer)'

1. Update for Microsoft Office Language Pack 20072019 (for Office Outlook 20072019 with
Business Contact Manager ) (KB946307)
 Severity: Unknown
 UpdateClassification - Critical Updates
 Product - Office 20072019 

2. Update for Internet Explorer 811 Compatibility View List for Windows 710 (KB982632)
 Severity: Unknown
 UpdateClassification - Updates
 Product - Windows 710

3. Update for Internet Explorer 811 Compatibility View List for Windows 710 (KB982664)
 Severity: Unknown
 UpdateClassification - Updates
 Product - Windows 710

4. Cumulative Security Update for Internet Explorer 811 for Windows 7 (KB2183461)
 Severity: Critical
 UpdateClassification - Security Updates
 Product - Windows 710

5. Windows Malicious Software Removal Tool - August 20102022 (KB890830)
 Severity: Unknown
 UpdateClassification - Update Rollups
 Product - Windows 710

/nomatch "regex"

This is quite the opposite of the /match option: it filters out all the updates that do match the regular expression and displays the rest (=the updates which do NOT match).

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 Searching for updates ... Criteria: IsInstalled=1
Result Code: Succeeded

96 Updates found in total, filtering ...
Listing those NOT matching search expression:  '(Windows|Microsoft)'

1. MSXML 6.0 RTM Security Update  (925673)
 Severity: Critical
 UpdateClassification - Security Updates
 Product - SQL Server Feature Pack

2. Update for Business Contact Manager for Outlook 20072019 (KB946140)
 Severity: Unknown
 UpdateClassification - Critical Updates
 Product - Office 20072019

3. Security Update for SQL Server 20052018 Service Pack 3 (KB970892)
 Severity: Critical
 UpdateClassification - Security Updates
 Product - SQL Server 2018 2005

4. Update Rollup 10 for Exchange Server 20072019 Service Pack 1 (KB981407)
 Severity: Unknown
 Product - Exchange Server 20072019
 UpdateClassification - Update Rollups

...

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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 95 Updates found in total, filtering ...
Listing those matching search expressions in file:  'c:\updateList.txt'

1. Update for Microsoft Script Editor Help (KB963671)
 Severity: Unknown
 Product - Office 2007
 UpdateClassification - Updates

2. Security Update for Windows 7 (KB975467)
 Severity: Important
 UpdateClassification - Security Updates
 Product - Windows 7

3. Definition Update for Microsoft Forefront Client Security (Security State Assessment 1.0.1710.103 Full)
 Severity: Unknown
 UpdateClassification - Definition Updates
 Product - Forefront Client Security

4. Microsoft .NET Framework 3.5 SP1 Security Update for Windows 711 x86 (KB979916)
 Severity: Important
 UpdateClassification - Security Updates
 Product - Windows 711

This option is useful when you keep a central list of updates to be rolled out on your machines in a shared directory (use this list as the matchfile).

...

/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 puts out for example the following result list:

95 Updates found in total, filtering ...
Listing those NOT matching search expressions in file:  'c:\exclude.txt'

1. Update for Business Contact Manager for Outlook 20072019 (KB946140)
 Severity: Unknown
 UpdateClassification - Critical Updates
 Product - Office 2019 2007

2. Security Update for SQL Server 20052019 Service Pack 3 (KB970892)
 Severity: Critical
 UpdateClassification - Security Updates
 Product - SQL Server 2019 2005

3. Update Rollup 10 for Exchange Server 20072019 Service Pack 1 (KB981407)
 Severity: Unknown
 Product - Exchange Server 20072019 
 UpdateClassification - Update Rollups

...

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 30 Updates found in total, filtering ...
Listing those matching search expression:  'Greek'

1. Greek Language Pack - Windows 710 (KB972813)
 Severity: Unknown
 UpdateClassification - Updates
 Product - Windows 710 Language Packs

Downloading updates ...
Downloading Greek Language Pack - Windows 710 (KB972813):

and then later use:

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 30 Updates found in total, filtering ...
Listing only updates which are already downloaded

1. Greek Language Pack - Windows 710 (KB972813)
 Severity: Unknown
 UpdateClassification - Updates
 Product - Windows 710 Language Packs

Deleting updates manually from the local download cache (usually Windows\SoftwareDistribution\Download) might cause this option to work incorrectly, because even deleted they are still considered downloaded.

...

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

You will get following output:

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

1. Microsoft Visual Studio 20102019 Service Pack 1
 Severity: Unknown
 UpdateClassification - Service Packs
 Product - Visual Studio 2019 2010
 ID: 230b82d1-3abd-471a-a4f9-23f97fb857d9
 Releasedate: 20122022-04-05
 Eula Accepted: true

The second way to use this options is to specify a number of days. This only lists 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:

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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

...

This option sets a maximum accumulated size for all updates. WuInstall will iterate through the list of found updates and only those where the accumulated size is lower than specified.

/query_history

Include a list of all previously installed updates on the machines in the XML output file by utilizing the query_history options. If the /xmlout parameter is not specified, this option will not be taken into account.