1. Basic functions
There are three basic switches. Exactly one of them must be specified in order for WuInstall to do something. It makes no sense to specify more than one of those switches (e.g. wuInstall /search /install), because download automatically includes a search and install automatically includes search and download.
1.1. Searching for updates
The simplest command in WuInstall is just searching for updates:
It lists all available updates. It either searches on the Windows Update Server in the internet, or, if configured, on your WSUS. It has no impact on your system at all. In this case it just performs a search and lists what was found.
1.2. Downloading updates
You can download updates with WuInstall with
It does the same search as WuInstall /search and then downloads the updates, which were found. WuInstall itself does not download anything, but it triggers the Microsoft Windows Update Engine, which downloads the updates.
1.3. Downloading updates to a certain directory
The download option can be extended, in order to also copy the installation packages included in the download to a certain directory (e.g. for manual installation and distribution)
WuInstall /download_to "c:\updates_download"
Does exactly the same as WuInstall /download, but afterwards it copies the contents of the downloaded updates (usually .exe or .msi-files) for example to c:\updates_download, from where they can be installed manually or copied and used for patching other machines.
1.4. Installing updates
To install the updates, you use:
It searches the updates, downloads them (if they have not been downloaded by a previous WuInstall /download command already) and then installs them.
2. Selecting updates
With various switches, you can narrow the results of the search for updates and therefore also the updates, which are downloaded and installed. You can use criteria queries, search updates, which match certain names, severities, products or classifications.
2.1. Specifying criteria
With /criteria you can specify a query string, in order to change the search. The default criteria (when no /criteria is specified) is "IsInstalled=0 and Type='Software'".
You can, for example search for updates, which are already installed:
wuInstall /search /criteria "IsInstalled=1"
(here, obviously, a /download or /install makes no sense)
Furthermore you can also just select drivers:
wuInstall /search /criteria "IsInstalled=0 and Type='Driver'"
or drivers and software:
wuInstall /search /alltypes
which is equivalent to:
wuInstall /search /criteria "IsInstalled=0"
2.2. Matching specific search strings
With the /match option, you can get all updates with titles matching a specific search string.
For example, you can search for a specific update:
wuInstall /search /match "KB956844"
only lists the "Security Update for Windows XP (KB956844)"
In the WuInstall Pro Version /match also supports regular expressions, for example find all updates which have the terms “Language” OR “KB93” OR “Live” in their title:
WuInstall /search /match "(Language|KB93|Live)"
2.3. Not Matching specific search strings
In the WuInstall Pro Version, there is, corresponding to the /match-switch also a /nomatch-switch For example, search all updates which do NOT match "SQL" OR "Windows" OR "KB"
WuInstall /search /nomatch "(SQL|Windows|KB)"
/match and /nomatch can, of course, also be used in combination, for example search all updates which match "SQL" OR "Office" but do not Match "KB" or "Microsoft"
WuInstall /search /match "(SQL|Office)" /nomatch "(KB|Microsoft)"
2.4. Search string in files
It is also possible to put search strings in a file. For example, you create a file match.txt with the following search string (separated by a newline):
Internet Explorer 11
If you execute
wuInstall /search /matchfile c:\Data\match.txt
Your will get all updates matching KB93, KB94, KB95, Office or Internet Explorer 8.
There is also a /nomatchfile switch, which does the opposite, which excludes updates matching one of the search terms in the file.
wuInstall /search /nomatchfile c:\Data\match.txt
Regular expressions are also possible as search expressions in the files.
Each security update has a certain severity. There are five possible severities:
The letter in brackets is the code for the /severity - option. Just put the letters together to select multiple severities.
For example, all critical and important updates:
WuInstall /search /severity CI
Each update belongs to one of those classifications:
Just put the letters in the bracket together to select multiple severities. For example, select all security updates, critical updates and updates:
WuInstall /search /classification SCU
Each update belongs to a Microsoft product, for example Office 2019, Windows 11, Visual Studio 2019, Silverlight, ...
The /product switch enables to search by one product.
For example, find all Updates for Visual Studio 2019:
WuInstall /search /product "Visual Studio 2019"
3. Additional options
There are some additional options with which you can control the behavior WuInstall and the installation of updates. For example rebooting the system, bypassing the wsus or accepting EULAs without user interaction.
The reboot-option just reboots the system n seconds after WuInstall has finished. It can be used together with search, download or install and it can also be used standalone.
For example, reboot in 30 seconds:
WuInstall /reboot 30
If no time interval is specified, 10 seconds is the default delay.
Reboot 10 seconds after the updates have been installed:
WuInstall /install /reboot
With this option complete cumulative updating of windows systems becomes possible. That means installing updates, rebooting and installing further updates will be automated. After performing an update and rebooting afterwards, WuInstall starts again before the Windows Logon and executes the same command again, that was done before the reboot. The /rebootcycle option uses the Windows Task Scheduler to restart WuInstall.
The /rebootcycle option works together with /reboot or /reboot_if_needed.
When the /rebootcycle is used WuInstall outputs in the console:
wuInstall /install /logfile_append c:\loginst.txt /reboot_if_needed /rebootcycle 2
This command installs all available software updates. If necessary the system will reboot after an update installation and WuInstall will execute the command until all pending available updates are installed. In this case the numbers of reboots is limited to a maximum of 2 in any case. Also the /logfile_append option is set to have a report about the whole installation process including all reboots.
3.3. Rebootcycles and shutdown when finished
As already mentioned the /rebootcycle option automates reboots between updates. In many cases it might be necessary to shutdown the machine after having all updates done. For example if you want to schedule your windows updates during the night.
Example usage, which installs all available updates and shuts down the system when finished:
WuInstall /install /rebootcycle /shutdown
3.4. Bypassing the WSUS
If you have a WSUS, but want to go for the Windows Update Site instead of WSUS for some reason, you can use the option /bypass_wsus to bypass the WSUS server for the time WuInstall is executed.
For example, bypass wsus and install update KB956844 from the Windows Update Site:
WuInstall /install /bypass_wsus /match "KB956844"
After execution of WuInstall, WSUS is re-activated for your system. This option automatically executes the Sc stop wuauserv and Sc start wuauserv commands in order for the bypass to take effect.
3.5. Selecting another WSUS
Quite the opposite of the bypass_wsus option is the /use_wsus option. If you want to choose another WSUS, or if you have no WSUS configured at the machine and want to get updates from a certain WSUS, the use_wsus option can force WuInstall to use a certain WSUS
For example, install your updates from the server wsus2 instead of wsus1:
WuInstall /install /use_wsus
WuInstall writes something like this:
You are using WSUS Server
use_wsus specified .... WUServer and WUStatusServer successfully set to
After execution of WuInstall, the initial state is restored (e.g. wsus1 is re-activated or WSUS is switched off again if it was off)
use_wsus specified, reactivating WUServer http://wsus1, WUStatusServer http://wsus1 ... successful!
3.6. Accepting EULAs
Some updates require the user to accept an EULA in order to install. To automate this, the /autoaccepteula option automatically accepts all EULAs for updates which require this, without any user interaction or interruption.
WuInstall /install /autoaccepteula