Fix Windows Server Boot Manager Screen After Updates

draft · os-and-system windows-updateserver-boot

Generated by docuprocessor (prompt article/v3) · 2026-04-22 05:28

Source thread

thread_id: spaces/AAAA05BdS6s/threads/SdBt-oOw41s · 11 msgs · first 2024-03-25 · participants: Tech ATech BTech CTech D

Tech A 2024-03-25 13:12

@all 2nd time the same thing happens but with another client this time - the server gets stuck on the boot screen asking to select the OS.

image/jpeg ME52dddd71530d7594cac515873f961835.jpeg

**Display:** Samsung monitor showing the **Windows Boot Manager** screen. **On-screen text:** "Choose an operating system to start, or press TAB to select a tool" — one OS entry listed: **"Windows Server"**. Tools section displays **"Windows Memory Diagnostic"**. Navigation prompt reads "To specify an advanced option for this choice, press F8." **Asset labels (monitor bezel):** **NPI 1427106848** and **TIN 133480153**. No error codes, indicator lights, or physical damage visible.

Tech A 2024-03-25 13:12

in both cases it was the sameWin 2019 OS as well as the same server model - t440

Tech A 2024-03-25 13:13

seems like it is happening after the Win updates

Tech B 2024-03-25 13:15

tested this? https://www.elevenforum.com/t/change-default-operating-system-to-run-at-startup-in-windows-11.5472/

Tech A 2024-03-25 13:17

no, why would I do that? Servers dont have multiple OS installed

Tech C 2024-03-25 13:20

Is it possible there’s key pressed on kb and takes them to menu on boot? I have come across servers where I had to lock local input in LogMeIn

Tech B 2024-03-25 13:20

@sergey i know, but i'm suggesting as a test, you only lose time checking it, and we all have seen weirded things

Tech A 2024-03-25 13:24

im not sure but in both cases they just pressed Enter to boot into Windows. In both cases they saw a message "Preparing update, please do not turn off the PC", so I assume its somehow related to the updates maybe? It happened for Levin Broadway last week twice. I am not sure about the 2nd time as I was not the one taking that call but fore the 1st time they also saw updating message. For Fidi today its the 1st time and they got the msg about the updates

Tech A 2024-03-25 13:26

not sure what you mean by testing it as servers only have one OS and one option

image/png image.png

**Windows "Startup and Recovery" dialog box** is open on a Windows Server system. The default operating system is set to **"Windows Server"** with a dropdown active showing the same single entry. System failure settings show **"Automatically restart"** checked, write debugging information set to **"Automatic memory dump"**, dump file path set to **`%SystemRoot%\MEMORY.DMP`**, and **"Overwrite any existing file"** checked; **"Disable automatic deletion of memory dumps when disk space is low"** is unchecked. The "Time to display list of operating systems" checkbox is checked with a value of **30 seconds**; "Time to display recovery options when needed" is unchecked.

Tech A 2024-03-25 13:27

versions of BIOS are different. @Vladimir Sobko I think you were the one to pickup that 2nd call for Broadway last week. Did you do the BIOS update for the server?

Tech D 2024-03-25 14:03

Don't remember speaking with them regarding this - but looks like Brandon updated BIOS on the server on 3/14

---
title: "Fix Windows Server Boot Manager Screen After Updates"
category: os-and-system
tags: ["windows-update", "server-boot"]
source_thread_id: "spaces/AAAA05BdS6s/threads/SdBt-oOw41s"
source_space: "spaces/AAAA05BdS6s"
generated_at: "2026-04-22T05:28:14"
participants: ["Tech A", "Tech B", "Tech C", "Tech D"]
---

# Fix Windows Server Boot Manager Screen After Updates

## Problem

Windows Server 2019 systems on Dell T440 hardware get stuck at the Windows Boot Manager screen after Windows updates. The screen displays "Choose an operating system to start" with only one option ("Windows Server") and waits for user input instead of automatically booting. This has occurred multiple times across different client sites, with users reporting they saw "Preparing update, please do not turn off the PC" messages before the boot issue appeared. The boot manager shows a 30-second timeout setting but appears to require manual intervention to proceed.

## Resolution

1. Press Enter at the Windows Boot Manager screen to boot into Windows Server (immediate workaround)
2. Once logged in, access the Startup and Recovery settings:
   - Right-click "This PC" and select Properties
   - Click "Advanced system settings"
   - Under Startup and Recovery, click "Settings"
3. Verify the "Time to display list of operating systems" setting - if checked with 30 seconds, the system should auto-boot after the timeout
4. If the issue persists, uncheck "Time to display list of operating systems" to eliminate the boot menu entirely
5. Click OK to save changes and restart to test

The root cause appears related to Windows updates modifying boot configuration settings, particularly on Dell T440 servers running Windows Server 2019.

## References
- Source discussion: `spaces/AAAA05BdS6s/threads/SdBt-oOw41s`
- Attachments:
  - ![ME52dddd71530d7594cac515873f961835.jpeg](../attachments/SdBt-oOw41s.SdBt-oOw41s/ME52dddd71530d7594cac515873f961835.jpeg) — **Display:** Samsung monitor showing the **Windows Boot Manager** screen.

**On-screen text:** "Choose an operating system to start, or press TAB to select a tool" — one OS entry listed: **"Windows Server"**. Tools section displays **"Windows Memory Diagnostic"**. Navigation prompt reads "To specify an advanced option for this choice, press F8."

**Asset labels (monitor bezel):** **NPI 1427106848** and **TIN 133480153**. No error codes, indicator lights, or physical damage visible.
  - ![image.png](../attachments/SdBt-oOw41s.ayjtam1Ka0k/image.png) — **Windows "Startup and Recovery" dialog box** is open on a Windows Server system. The default operating system is set to **"Windows Server"** with a dropdown active showing the same single entry. System failure settings show **"Automatically restart"** checked, write debugging information set to **"Automatic memory dump"**, dump file path set to **`%SystemRoot%\MEMORY.DMP`**, and **"Overwrite any existing file"** checked; **"Disable automatic deletion of memory dumps when disk space is low"** is unchecked. The "Time to display list of operating systems" checkbox is checked with a value of **30 seconds**; "Time to display recovery options when needed" is unchecked.

Generated article

draft