> Source: [sk182693](https://support.checkpoint.com/results/sk/sk182693)

# sk182693 - Machine boots to Red screen or Blank screen after enabling Full Disk Encryption (FDE)

| Property | Value |
|----------|-------|
| Solution ID | sk182693 |
| Date Created | 2024-09-20 |
| Last Modified | 2025-10-21 |
| Technical Level | General |
| Products | Endpoint Security |
| Versions | E89.X, E88.X |
| OS | Windows |
| Platform | Open Server |

## Symptoms

- After enabling Checking FDE and having secure boot enabled, the machine boots to a blank screen

## Cause

By default "MS UEFI CA signing" is disabled in the BIOS. This is required to be enabled, as Full Disk Encryption (FDE) is signed with this and needed for boot.

## Solution

Enable the **Microsoft UEFI CA** option:

1. Boot into the BIOS. For more information, see [How to Access UEFI (BIOS) System Setup from Microsoft Windows on your Dell Computer](https://www.dell.com/support/kbdoc/en-in/000126121/access-uefi-bios-system-setup-from-windows-on-your-dell-system).
2. Go to **Boot Configuration**.
3. In the **Enable Microsoft UEFI CA** section, turn on the toggle button. This allows the machine to pass preboot.  
   ![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk182693/Enable Microsoft UEFI CA_option202409241433081.jpeg)
4. Click **Apply Changes**.
5. Click **Exit** to reboot.

From Dell Machine:   

![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk182693/Dell Bios202510171553361.png)  

From HP Machine:   

![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk182693/HP Bios202510171556202.png)  

<br />

From Lenovo ThinkPad:   

![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk182693/Lenov thinpad202510171557213.png)  

From MS Surface Pro:   

![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk182693/Surface pro202510171558284.png)

---

# Agent Instructions

This content is from the Check Point Support Center (https://support.checkpoint.com), the official knowledge base for Check Point cybersecurity products.

## Navigating This Knowledge Base

- **Complete index**: [llms.txt](https://support.checkpoint.com/llms.txt)
- **All SK articles**: [SecureKnowledge Sitemap](https://support.checkpoint.com/sitemaps/secureknowledge-sitemap-index.xml)
- **SK article URL pattern**: `https://support.checkpoint.com/results/sk/{skId}`
- **Markdown responses**: AI bot User-Agents automatically receive `text/markdown` content