> Source: [sk105100](https://support.checkpoint.com/results/sk/sk105100)

# sk105100 - "Error 1720: There is a problem with this Windows Installer package" during Endpoint Security Client installation

| Property | Value |
|----------|-------|
| Solution ID | sk105100 |
| Date Created | 2015-03-06 |
| Last Modified | 2021-10-07 |
| Technical Level | General |
| Products | Endpoint Security |
| Versions | Cloud, E89.X, E88.X |
| OS | Windows |

## Symptoms

- "`Error 1720: There is a problem with this Windows Installer package. A script required for this install to complete could not be run. Contact your support personnel or package vendor.`" during Endpoint Security Client installation.

## Cause

**This is a Microsoft issue and has been known to occur in Windows XP, Windows 7, and Windows 8.**

## Solution

* **To work around the Microsoft issue, the MSI Installer on the Windows OS needs to be unregistered and re-registered.**

  **Procedure:**
  1. Open the Windows Command Prompt as Administrator (in Start menu, right-click on the Command Prompt icon - click on "`Run as administrator`").

  2. Unregister the MSI Installer by running this command:

     *msiexec /unregister*
  3. Re-register the MSI Installer by running this command:

     *msiexec /regserver*

  **Notes:**
  * The "`msiexec /unregister`" and "`msiexec /regserver`" commands return a message only if there is an error.

  * If the "`msiexec /unregister`" and "`msiexec /regserver`" commands do not resolve the issue, then try running the following commands via PowerShell (as admin):  

    \*Important Note: Several other services are dependent upon the WMI (winmgmt) service, depending on the operating system version that the system is running.\*

    1. *winmgmt /salvagerepository*
    2. Stop-Service winmgmt -Force; winmgmt /resetrepository
    3. *Restart machine*
* **Stopping and starting Windows Installer service can also solve the issue.**

**Note:** This solution from Microsoft resolves an issue with Windows 10.  
<https://support.microsoft.com/en-us/help/17588/windows-fix-problems-that-block-programs-being-installed-or-removed>

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