WINDOWS SERVICE
msiserver: Windows Installer
Adds, modifies and removes applications provided as a Windows Installer (*.msi, *.msp) package.
TECHNICAL SUMMARY
| Service name | msiserver |
|---|---|
| Display name | Windows Installer |
| Runs from | C:\Windows\System32\msiexec.exe |
| Command line | msiexec.exe /V |
| Runs as | LocalSystem |
| Signed by | Microsoft Windows |
| Verdict | Leave it alone |
| Microsoft, Windows Server 2016 guidance | No guidance |
Paths, signer and service account observed on Windows 11 build 26300 on 12 November 2026. Run the commands below to check your own PC.
Should you touch it?
Leave it aloneMicrosoft's guidance for Windows 10 and 11 IoT Enterprise rates it Don't disable, and notes that services which explicitly depend on it fail to start if it is disabled. Its default startup type is Manual, so it costs nothing while idle: on the PC used for this page it was set to Manual and stopped.
What PC Tweaker does with it
PC Tweaker does not change this service. No control in the catalogue stops it, disables it or edits its start type.
Check it yourself
See its state and start type
PowerShellGet-Service msiserver | Format-List Name, DisplayName, Status, StartType sc qc msiserver
Common questions
What does the msiserver service do?
Adds, modifies and removes applications provided as a Windows Installer (*.msi, *.msp) package. It runs C:\Windows\System32\msiexec.exe (msiexec.exe /V) as LocalSystem.
Can I disable msiserver?
Leave it alone. Microsoft's guidance for Windows 10 and 11 IoT Enterprise rates it Don't disable, and notes that services which explicitly depend on it fail to start if it is disabled. Its default startup type is Manual, so it costs nothing while idle: on the PC used for this page it was set to Manual and stopped.
The Windows Installer service is not running. Is that a problem?
Not by itself. Microsoft lists its default startup type as Manual: Windows starts it when an installation needs it. On Windows 11 build 26300 it was stopped while nothing was being installed. It is a problem only if the startup type has been changed to Disabled, which Get-Service msiserver | Select-Object Status, StartType shows.
Is msiserver the same thing as msiexec.exe?
msiserver is the service name; the program it runs is msiexec.exe. On build 26300 the service is registered as C:\Windows\system32\msiexec.exe /V, runs as LocalSystem and depends on RpcSs. The same executable is the command-line tool Microsoft documents for installing, modifying and performing operations on Windows Installer packages.