> Source: [sk171418](https://support.checkpoint.com/results/sk/sk171418)

# sk171418 - Unsupported characters use in Endpoint Security Client uninstall password prevents January 1st, 2021 patch from being installed  

| Property | Value |
|----------|-------|
| Solution ID | sk171418 |
| Date Created | 2021-01-06 |
| Last Modified | 2021-01-06 |
| Technical Level | General |
| Products | Endpoint Security |
| Versions | Cloud, E89.X, E88.X, R82.x, R82.20, R82.10, R82, R81.20 |
| OS | Windows |

## Symptoms

- The following error is displayed in C:\\Windows\\Internet Logs\\EP_CDTDll.log: Disabling self protection Failed turning off self protection

## Cause

The Endpoint Security Client uninstall password contains characters other than the allowed ones.

## Solution

1. Change the uninstall password on the Security Management using the allowed characters:
   * English letters in lower or upper case, and these special characters: 0-9 , \~ = + - _ () ' $ . @
2. Wait for the clients to connect to the Security Management to synchronize the new password.
3. Apply the patch again.

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