> Source: [sk173487](https://support.checkpoint.com/results/sk/sk173487)

# sk173487 - "Verification of installation package failed. error 28151" when upgrading Endpoint Security Client 

| Property | Value |
|----------|-------|
| Solution ID | sk173487 |
| Date Created | 2021-05-25 |
| Last Modified | 2025-05-22 |
| Technical Level | Advanced |
| Products | Endpoint Security |
| Versions | E89.X, E88.X |

## Symptoms

- * "`Verification of installation package failed. error 28151`" when the user upgrades the Endpoint Security Client or installs the initial Client.

* *C:\\ProgramData\\CheckPoint\\Logs\\cpda.log* shows this message:


  `
  DATE TIME t:3632 root [debug] Module state: Scheduled, version: 8X.XX.XXXX, installMask: XXXXXX, packageCode: XXXXX-XXXX-XXXX-XXXX-XXXXXXX, productCode: , `**errorCode: XXXXX, errorDescription: Verification of installation package failed**`, name: Check Point Endpoint Security Threat Prevention x64 [CDA::compRestartQuestionHandler]
  `

* During manual Harmony Endpoint client installation, the following error is shown - "**Error 26648**.Could not locate "DigiCert Assured ID Root CA" in "Trusted Root Certification Authorities" store. It is required for this build of Check Point Endpoint Security. Please install it and retry the installation."
* When installing a tiny agent - it downloads Initial client into C:\\Windows\\Temp folder and the installation of Initial client does not start.
* If running an exported Dynamic package installation - after extracting files an error is displayed: "Error: Installation package was modified on the server! Installation aborted."

## Cause

Starting from E84.40 version, there is a change in the countersignatures from Symantec to DigiCert because of certificate expiration.  

In rare scenarios, if a client is disconnected from the Internet or was not updated for a long time, installation package verification may fail.  

<br />

## Solution

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