Pop up Windows Install Window - legit

[Clariman]

In the last month or so I've had a popup window appear on my Windows 11 system that appears to come out of the blue. It has probably happened about 4 times. It asks me to click on OK. So far I have just been closing the window (with x at top right) without clicking OK. Is this legit? What is Windows trying to do here? It looks as if something is trying to do a remote install but my PC is standalone - just connected to the Internet.

Windows ® Installer. V 5.0.22621.1

msiexec /Option <Required Parameter> [Optional Parameter]

Install Options
</package | /i> <Product.msi>
Installs or configures a product
/a <Product.msi>
Administrative install - Installs a product on the network
/j<u|m> <Product.msi> [/t <Transform List>] [/g <Language ID>]
Advertises a product - m to all users, u to current user
</uninstall | /x> <Product.msi | ProductCode>
Uninstalls the product
Display Options
/quiet
Quiet mode, no user interaction
/passive
Unattended mode - progress bar only
/q[n|b|r|f]
Sets user interface level
n - No UI
b - Basic UI
r - Reduced UI
f - Full UI (default)
/help
Help information
Restart Options
/norestart
Do not restart after the installation is complete
/promptrestart
Prompts the user for restart if necessary
/forcerestart
Always restart the computer after installation
Logging Options
/l[i|w|e|a|r|u|c|m|o|p|v|x|+|!|*] <LogFile>
i - Status messages
w - Nonfatal warnings
e - All error messages
a - Start up of actions
r - Action-specific records
u - User requests
c - Initial UI parameters
m - Out-of-memory or fatal exit information
o - Out-of-disk-space messages
p - Terminal properties
v - Verbose output
x - Extra debugging information
+ - Append to existing log file
! - Flush each line to the log
* - Log all information, except for v and x options
/log <LogFile>
Equivalent of /l* <LogFile>
Update Options
/update <Update1.msp>[;Update2.msp]
Applies update(s)
/uninstall <PatchCodeGuid>[;Update2.msp] /package <Product.msi | ProductCode>
Remove update(s) for a product
Repair Options
/f[p|e|c|m|s|o|d|a|u|v] <Product.msi | ProductCode>
Repairs a product
p - only if file is missing
o - if file is missing or an older version is installed (default)
e - if file is missing or an equal or older version is installed
d - if file is missing or a different version is installed
c - if file is missing or checksum does not match the calculated value
a - forces all files to be reinstalled
u - all required user-specific registry entries (default)
m - all required computer-specific registry entries (default)
s - all existing shortcuts (default)
v - runs from source and recaches local package
Setting Public Properties
[PROPERTY=PropertyValue]

Consult the Windows ® Installer SDK for additional documentation on the
command line syntax.

Copyright © Microsoft Corporation. All rights reserved.
Portions of this software are based in part on the work of the Independent JPEG Group.

[servodude]

Windows ® Installer. V 5.0.22621.1

Checking for the above online....

gives this thread on microsoft answers

it involves downloading a msoft app called Autoruns from https://learn.microsoft.com/en-us/sysinternals/downloads/autoruns

and then using this to remove an entry called msiexec.exe entry from the Logon tab there in Autoruns

The "why" this is happening is not entirely clear.
This is a bona fide Microsoft installer utility so I suspect "something" happened during an update (of the OS or a program) leaving the intention to launch this; seemingly without whatever it needs to complete its purpose and tidy up after itself.