How to Fix Windows Installer Error


You tried to install a program and it fails with Windows Installer error. The error indicates there is some problem with the installation.

Common Errors:

  • Could not start the Windows Installer service on Local Computer.
  • Error 1303: The installer has insufficient privileges to access this directory
  • Error 1719: The Windows Installer service could not be accessed
  • Error 1720: There is a problem with this Windows installer package
  • Windows Installer Service could not be started

This article includes various steps to diagnose program installation errors. You’ll learn how to repair Windows Installer files, components, Registry data, Firewall conflicts, corruption of setup extracted contents, and so on.

Download Diagnostic

You’re just 3 steps away from fixing this problem…

1. Download and install the Diagnostic

2. Run full scan

3. Perform system clean-up & repair

Estimated download time: 10 Seconds


Reregister Windows Installer Files

Execute the specified command to re-register Windows Installer files using Command Prompt.


For Windows 10/ 8,1/ 8:

1. Type “Command Prompt” in the Search Box.

2. Right click it in Search Results; choose Run as administrator.

3. Execute the following commands:


4. Restart your computer for the changes to take effects.

For Windows 7/ Vista:
1. Click Start button on your Taskbar.
2. Click All Programs | Accessories.
3. Right click Command Prompt, select Run as administrator.
4. Refer Step # 3-4 under Windows 10/ 8.1/ 8 user’s section.

Clean Boot your PC

Disable all Non-Microsoft startup items to avoid conflicts with Windows Installer utility.


For Windows 10/ 8.1/ 8:
1. Press Windows Key + R.
2. This opens up Run dialog box.
3. Type “msconfig” and press ENTER key.
4. In the System Configuration dialog that appears, click Startup tab.
5. Click “Open Task Manager” link.
6. You have now Task Manager opened up with Startup tab.
7. Disable all Non-Microsoft items. Right click an item, select Disable option.
8. Reboot your PC.

For Windows 7/ Vista:
1. Refer Steps # 1-4 under Windows 10/ 8.1/ 8 user’s section.
2. Uncheck all Non-Microsoft items displayed in the list box.
3. Click Apply | OK.
4. Restart your PC for the changes to take effects.

Turn Off User Account Control Notifications

Disable UAC notifications from Control Panel.


For Windows 10:

1. Press Windows Key + X; choose Control Panel from the options.

2. Open the following:

  • User Accounts | User Accounts

3. Click the link named “Change User Account Control settings”, and then move the slider to the bottom.

4. Save your changes by clicking OK and then restarting the machine.

For Windows 8.1/ 8:
1. Press Windows Key + X, select Control Panel.
2. Click User Accounts and Family Safety | User Accounts.
3. Click “Change User Account Control settings” link.
4. Move the slider to far bottom, i.e. Never Notify.
5. Click OK.
6. Restart the PC.

For Windows 7:

1. Click Start; type “Change user account control settings”

2. Open the keyword from Search Results.

3. Refer Steps # 4-6 under Windows 8.1/ 8 user’s section.

For Windows Vista:

1. Click Start, select Control Panel.

2. Type “UAC” in Search Box.

3. Open “Turn User Account Control (UAC) on or off”

4. Uncheck the following checkbox:

  • Use User Account Control (UAC) to help protect your computer

5. Click OK; do reboot.

Determine Office Source Engine Service Status

Office Source Engine service might be stopped. Restart that service again.


For Windows 10/ 8.1/ 8/ 7/ Vista:
1. Press Windows Key + R.
2. Type “services.msc” and click OK.
3. This opens up Services tool that lists out information about all services- both running and stopped services.
4. Scroll down the page. Right click “Office 64 Source Engine” or “Office Source Engine” service, whichever exists.
5. Select Properties from context menu.
6. Now that you have Service Properties dialog opened up. Set automatic startup type in General tab.
7. Start the service if it is already stopped.
8. Click Apply | OK.

Determine Debug Folder Security

Check whether Debug folder has full administrative privileges.


For Windows 10/ 8.1/ 8/ 7/ Vista:
1. Double click This PC or Computer or My Computer icon.
2. Open following directory:

  • C:\Windows\

3. Right click “Debug” folder, select Properties.
4. This opens up Folder Properties dialog box. Click Security tab.
5. Click Edit button, provide all security permissions to the folder. Check-up following items under “Allow” column:

  • Full control
  • Modify
  • Read & execute
  • Read
  • Write

6. Click OK twice.

Restart Windows Installer Service

Using Services.msc tool restart Windows Installer service.

For Windows 10/ 8.1/ 8/ 7/ Vista:
1. Refer Steps # 1-3 under Determine Office Source Engine Service Status section.
2. Right click Windows Installer service, select Properties.
3. Start the service if it is stopped. Select Startup type: Automatic
4. Click Apply | OK.

Delete Setup Extracted Contents

Clean up all the temporarily extracted installer files.


For Windows 10/ 8.1/ 8/ 7/ Vista:
1. Double click This PC or Computer or My Computer icon.
2. Open following folder:

  • C:\Windows\Temp\

3. Delete all subfolders, files inside “Temp” folder.

Reinstall Windows Installer

Firstly, delete misconfigured Registry keys and then reinstall Windows Installer utility.


For Windows 10/ 8.1/ 8/ 7/ Vista:
1. Press Windows Key + R. Type “RegEdit” and click OK.
2. This opens up Registry Editor.
3. Locate the following subkey:

  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\

4. Right click “MSIServer” sub key, select Delete option.
5. Specify you want to delete the key in subsequent confirmation prompt.
6. Exit out of the screen.
7. Double click Computer icon.
8. Open following directory:

  • C:\Windows\System32\

9. Delete the file named “msiexec.exe”.
10. Visit Microsoft Download Center to download the latest version of Windows Installer.
11. Install the program on your PC.