84,488,480 programs installed

Should I remove Microsoft Installer?

What percent of users and experts removed it?
5% remove it95% keep it
Overall Sentiment
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How common is it?
Global Rank #33,852
Reach 0.0037%

Other programs by Microsoft

Microsoft Installer

What is Microsoft Installer?

The Microsoft Installer (MSI) is the application installation and configuration service for Windows. Windows Installer provides a standard foundation for installing and uninstalling software. Software manufacturers can create the setup of their products to use Windows Installer to help make software installation, maintenance, and uninstallation straightforward and easy.


It adds registry entry for the current user which will allow the program to automatically start each time it is rebooted. The software is designed to connect to the Internet and adds a Windows Firewall exception in order to do so without being interfered with. The setup package generally installs about 8 files and is usually about 2 MB (2,101,408 bytes).

Program detailsProgram details

URL: www.Microsoft.com
Installation folder: C:\Program Files\Outlook Express\data\bin\
Uninstaller: "C:\Program Files\Outlook Express\data\bin\unins001.exe"
Estimated size: 2 MB

Program filesFiles installed by Microsoft Installer

  • Explorer.exe - Explorer

Program behaviorsBehaviors exhibited

Startup File (User Run)
  • Explorer.exe is loaded in the current user (HKCU) registry as an auto-starting executable named 'Sys' and executes as C:\Program Files\Outlook Express\data\bin\Explorer.exe.
Windows Firewall Allowed Program
  • Explorer.exe is added as a firewall exception for 'C:\Program Files\Outlook Express\data\bin\Explorer.exe'.

How do I remove Microsoft Installer?

You can uninstall Microsoft Installer from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8/10: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program Microsoft Installer, click it, and then do one of the following:
    • Windows Vista/7/8/10: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove Microsoft Installer.

Win 7 (SP1) 59%
Win 7 1%
Auto-starting? Yes
(Found in the run registry)
Uninstall it 5%
Keep it 95%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 7 81.69%
Windows XP 12.68%
Windows 10 2.82%
Windows Vista 2.82%
Which OS releases does it run on?
Windows 7 Ultimate 40.85%
Windows 7 Home Premium 23.94%
Microsoft Windows XP 12.68%
Windows 7 Starter 7.04%
Windows 7 Professional 7.04%
Windows Vista Home Premiu... 2.82%

Distribution by countryGeography

29.07% of installs come from the United States
Which countries install it?
  United States 29.07%
  Brazil 16.28%
  Indonesia 10.47%
  MA 4.65%
  Iran 4.65%
  Thailand 3.49%
  LY 2.33%
  TN 2.33%
  India 2.33%
  Philippines 2.33%
  SY 2.33%
  Egypt 2.33%
  Saudi Arabia 2.33%
  Malaysia 2.33%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Acer 30.36%
Hewlett-Packard 21.43%
Dell 17.86%
Toshiba 7.14%
Lenovo 7.14%
ASUS 5.36%
Sony 3.57%
Samsung 1.79%
Compaq 1.79%
Intel 1.79%
American Megatrends 1.79%
Common models
HP Pavilion dv6 Notebook ... 3.28%
HP Pavilion g6 Notebook P... 3.28%
LENOVO 2958 3.28%
Sony VPCYB25AB 1.64%
Itautec S.A. Infoway 1.64%

About Microsoft

Microsoft Corporation develops, manufactures, licenses and supports a variety of products and services related to computing.
Publisher URL: www.microsoft.com


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