WindowsPackageManagerServer.exe

Windows ProcessMicrosoft Corporation

Also called windowspackagemanagerserver, winget server, app installer server

WindowsSystem Component

App Installer / winget COM server. It is the Windows Package Manager service host inside Desktop App Installer. It is not Microsoft Store StoreDesktopExtension.exe.

What you need to know

This is winget/App Installer server, not Microsoft Store StoreDesktopExtension.

WindowsPackageManagerServer.exe is the COM server for winget and App Installer (Microsoft.DesktopAppInstaller). StoreDesktopExtension.exe is a Microsoft Store package helper. Ending this server does not cancel a Store cart. Ending StoreDesktopExtension does not stop winget.

Safe?: Yes, from App Installer / winget
Is it Store?: No. StoreDesktopExtension is Store
Should I end it?: A winget or App Installer job can fail

Feex says

If winget is installing and this server is busy, I let it finish. I do not end StoreDesktopExtension thinking it is the same product.

What is WindowsPackageManagerServer.exe?

WindowsPackageManagerServer.exe is the winget / App Installer server, not StoreDesktopExtension.exe. The package is Microsoft.DesktopAppInstaller. Microsoft Store UI helpers live in the Store package.

What does it do?

It answers COM calls from winget.exe and App Installer so packages can install. It does not draw the Store. msiexec.exe is still Windows Installer for MSI.

Why is it running?

You ran winget, opened an .appinstaller, or another app called the package manager. A leftover after winget exits can be the COM server winding down.

Is it safe?

Usually safe

The DesktopAppInstaller package server is Microsoft. A WindowsPackageManagerServer.exe in Temp is not. This is still not StoreDesktopExtension.

A legitimate copy normally runs from:

C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_*\WindowsPackageManagerServer.exe

Package: Microsoft.DesktopAppInstaller
Client CLI is winget.exe in the same family
Not WindowsApps\Microsoft.WindowsStore\...\StoreDesktopExtension.exe

Can I end it?

winget / App Installer can fail

Ending the server mid-install can leave a pending package. Store installs use StoreDesktopExtension, not this file. msiexec is a different installer.

Can I remove it?

Repair App Installer, do not delete WindowsApps

Reset or update App Installer from the Store. Do not delete StoreDesktopExtension to remove winget. Do not take ownership of WindowsApps.

Should it start with Windows?

winget or App Installer starts the COM server on demand. It is not a Startup Apps checkbox next to Store.

Normal resource behavior

These are contextual labels, not universal averages.

CPU: During install, hash, and extract
Memory: Moderate for a large package
Disk: Staging under the package manager cache
Network: winget source downloads

File information

WindowsPackageManagerServer.exe file information
Executable name	WindowsPackageManagerServer.exe
Common legitimate path	C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_*\WindowsPackageManagerServer.exe
Publisher	Microsoft Corporation
Signature expectation	Signed by Microsoft Windows

Common problems

People reset Microsoft Store to fix winget

StoreDesktopExtension is Store. This server is App Installer. Repair the Desktop App Installer package.

Confused with msiexec

MSI still uses msiexec.exe. winget can invoke other installers. The COM host is still this filename.

Troubleshooting

Diagnose before you change anything destructive.

winget --info and repair App Installer

If the server will not start, update Microsoft.DesktopAppInstaller from Store. wsreset.exe is a Store cache reset, not winget.

Open file location before you blame Store

DesktopAppInstaller is this article. Microsoft.WindowsStore\StoreDesktopExtension.exe is Store.

Technical details

WindowsPackageManagerServer.exe technical details
Image name	WindowsPackageManagerServer.exe
Role	winget / App Installer COM server
Package	Microsoft.DesktopAppInstaller

Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Feex Reviewed. How we research.

Microsoft Learn: winget · Windows Package Manager client uses App Installer
Microsoft Learn: App Installer · Desktop App Installer package hosts the COM server
Microsoft Learn: Windows · Primary Windows documentation
Microsoft Support: Windows · Public support naming
Foxhole process map · First-party samples on Windows PCs. Not a lab benchmark.

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