> Source: [sk181377](https://support.checkpoint.com/results/sk/sk181377)

# sk181377 - Reboot fails for Windows computer with Endpoint Security Client E87.40, Full Disk Encryption, and OPAL self-encrypting drive with "checking media presence"

| Property | Value |
|----------|-------|
| Solution ID | sk181377 |
| Date Created | 2023-08-09 |
| Last Modified | 2023-08-14 |
| Technical Level | Advanced |
| Products | Endpoint Security |
| Versions | Cloud, R82.10, R82, R81.20 |
| OS | Windows |

## Symptoms

- * After upgrade of Endpoint Security Client to E87.40, reboot fails for a Windows Endpoint Computer with Full Disk Encryption and an OPAL self-encrypting drive.
* The error message "*checking media presence*" (or a similar message) appears after the failed reboot.
* After users do the recovery key flow, a red screen appears.

## Solution

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