> Source: [sk163799](https://support.checkpoint.com/results/sk/sk163799)

# sk163799 - "Error 1321. The Installer has insufficient privileges to modify the file C:\Windows\SysWOW64\vsdata.dll." error message appears during Endpoint Security Client installation

| Property | Value |
|----------|-------|
| Solution ID | sk163799 |
| Date Created | 2019-12-04 |
| Last Modified | 2023-08-28 |
| Technical Level | Advanced |
| Products | Endpoint Security |
| Versions | Cloud, E89.X, E88.X |
| OS | Windows |

## Symptoms

- "`Error 1321. The Installer has insufficient privileges to modify the file C:\Windows\SysWOW64\vsdata.dll.`" error message during Endpoint Security Client installation.

## Cause

Some components of previous Endpoint Security Client installation are still running and cannot be replaced due to Endpoint Security Client self-protection mechanism.  

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## Solution

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