ThinOS 2511 (9.6.4029) Recovery Image File
Restart required Installed This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.This package contains the ThinOS 2511 (9.6.4029) Recovery Image file for OptiPlex 3000 Thin Client, Latitude 3420, 3440, 5440 and 5450, OptiPlex 5400 All-in-One, OptiPlex All-in-One 7410, OptiPlex All-in-One 7420, Dell Wyse 5470, and 5470 All-In-One Thin Clients. This image is intended for customers who want to install ThinOS 2511 (9.6.4029) recovery image.
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Fixes & Enhancements
- Improved the BIOS policy based on platform in the Admin Policy Tool.
- Supports the payload signing with SHA-512.
Read More- Supports the payload signing with SHA-512.
Version
2511, 2511
Release date
27 Nov 2025
Download Type
Operating Systems
Category
Operating System
Importance
RecommendedDell Technologies recommends applying this update during your next scheduled update cycle. The update contains changes to maintain overall system health. It ensures that the system software remains current and compatible with other system modules (firmware, BIOS, drivers, and software) and may include other new features.
Available formats View Important Information
File Format: Firmware Images
File Name: OS_ISO_2511_9.6.4029.zip
File Size: 1.52 GB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
To ensure the integrity of your download, please verify the checksum value.
MD5:
df57a65b960a963f343f088394010949
SHA1:
700cc7aa6f4bf70d8caa971877809fe04af73081
SHA-256:
198fa17c3812fd825602e42b60d7ab2c960e7374fb38cdc2cec929131b973ba1
By downloading, you accept the terms of the Dell Software License Agreement.
Important Information
Do not power off your thin client until the installation is complete.
You cannot boot into ThinOS 2511 (9.6.4029) or later versions when you perform the following operations:
1. Disable the onboard Network Interface Card (NIC), Trusted Platform Module (TPM), or Platform Trust Technology (PTT).
2. Clear TPM or PTT.
3. Reset BIOS to factory default settings.
From ThinOS 2408, ThinOS is updated to completely follow WMS Security Policy > TLS Security Level (default = 1). If your network environment requires a legacy OpenSSL version, then you must change the TLS security level to 0, when updating to 2511. Otherwise, the device can lose its network.
For more information about the updates, see the Dell ThinOS 9.x 2508 and 2511 Release Notes at www.dell.com/support.
You cannot boot into ThinOS 2511 (9.6.4029) or later versions when you perform the following operations:
1. Disable the onboard Network Interface Card (NIC), Trusted Platform Module (TPM), or Platform Trust Technology (PTT).
2. Clear TPM or PTT.
3. Reset BIOS to factory default settings.
From ThinOS 2408, ThinOS is updated to completely follow WMS Security Policy > TLS Security Level (default = 1). If your network environment requires a legacy OpenSSL version, then you must change the TLS security level to 0, when updating to 2511. Otherwise, the device can lose its network.
For more information about the updates, see the Dell ThinOS 9.x 2508 and 2511 Release Notes at www.dell.com/support.
Supported Operating Systems
ThinOS
ThinOS PCOIP
Installation instructions
Install ThinOS from USB drive using Dell OS Recovery Tool
Prerequisites
- Ensure that TPM or PTT is set to ON in BIOS.
- If you install the Windows operating system on the device, clear TPM or PTT before installing ThinOS.
Steps
1. Download Dell OS Recovery Tool at https://www.dell.com/support/home/en-us/drivers/osiso/recoverytool
2. Run the .exe file on the system to be used to create the USB drive.
The Dell OS Recovery Tool Application installer opens.
3. Click INSTALL.
4. After the installation is complete, open Dell OS Recovery Tool.
5. Select SWITCH TO ADVANCED RECOVERY displayed at the bottom of the tool.
6. In Select an OS image, browse to the ISO file that you downloaded and click NEXT.
7. Select the USB drive that you want to format from the USB drive dropdown.
NOTE: Some special USB drives do not support ThinOS ISO image by default. You can change the Partition Style and burn the operating system again.
8. Check the I understand that the selected drive will be reformatted and existing data will be deleted box.
9. Click BURN OS.
10. Remove the USB drive and connect it to the system that is powered off, on which you plan to install ThinOS. After connecting the USB drive, turn on the system.
NOTE: After the USB drive is removed, Dell OS Recovery Tool goes back to the screen that is displayed in Step 5.
11. Press F12 at boot up until you see the Dell logo and Preparing one-time boot menu... displayed at the top right corner. The boot menu opens.
12. In the boot menu, select the USB drive from the UEFI Boot Devices list.
NOTE: If you are unable to select the USB drive, ensure that Enable USB Boot Support option is enabled in BIOS.
13. Enter the BIOS password if prompted. The default password for most Dell thin clients is Fireport.
14. The thin client boots and a warning message with a 60-second countdown window is displayed.
Wait for 60 seconds or click OK to install the ThinOS image and application packages. The thin client reboots automatically.
Click Manually to display the ThinOS image and application packages list. Select the ThinOS image and the application packages that you want to install and click OK to install these files. The thin client reboots automatically.
NOTE: If your device is Dell Wyse 5470 and 5470 All-In-One Thin Clients, ensure to click Manually, select only ThinOS image, storage and click OK to install. Or installation will be failed due to storage space is not enough.
15. The system continues imaging and reboots automatically once complete.
For more information about how to Install ThinOS from USB drive using Dell OS Recovery Tool, see the Dell ThinOS Installation and ThinOS Activation License User Guide at www.dell.com/support.
Prerequisites
- Ensure that TPM or PTT is set to ON in BIOS.
- If you install the Windows operating system on the device, clear TPM or PTT before installing ThinOS.
Steps
1. Download Dell OS Recovery Tool at https://www.dell.com/support/home/en-us/drivers/osiso/recoverytool
2. Run the .exe file on the system to be used to create the USB drive.
The Dell OS Recovery Tool Application installer opens.
3. Click INSTALL.
4. After the installation is complete, open Dell OS Recovery Tool.
5. Select SWITCH TO ADVANCED RECOVERY displayed at the bottom of the tool.
6. In Select an OS image, browse to the ISO file that you downloaded and click NEXT.
7. Select the USB drive that you want to format from the USB drive dropdown.
NOTE: Some special USB drives do not support ThinOS ISO image by default. You can change the Partition Style and burn the operating system again.
8. Check the I understand that the selected drive will be reformatted and existing data will be deleted box.
9. Click BURN OS.
10. Remove the USB drive and connect it to the system that is powered off, on which you plan to install ThinOS. After connecting the USB drive, turn on the system.
NOTE: After the USB drive is removed, Dell OS Recovery Tool goes back to the screen that is displayed in Step 5.
11. Press F12 at boot up until you see the Dell logo and Preparing one-time boot menu... displayed at the top right corner. The boot menu opens.
12. In the boot menu, select the USB drive from the UEFI Boot Devices list.
NOTE: If you are unable to select the USB drive, ensure that Enable USB Boot Support option is enabled in BIOS.
13. Enter the BIOS password if prompted. The default password for most Dell thin clients is Fireport.
14. The thin client boots and a warning message with a 60-second countdown window is displayed.
Wait for 60 seconds or click OK to install the ThinOS image and application packages. The thin client reboots automatically.
Click Manually to display the ThinOS image and application packages list. Select the ThinOS image and the application packages that you want to install and click OK to install these files. The thin client reboots automatically.
NOTE: If your device is Dell Wyse 5470 and 5470 All-In-One Thin Clients, ensure to click Manually, select only ThinOS image, storage and click OK to install. Or installation will be failed due to storage space is not enough.
15. The system continues imaging and reboots automatically once complete.
For more information about how to Install ThinOS from USB drive using Dell OS Recovery Tool, see the Dell ThinOS Installation and ThinOS Activation License User Guide at www.dell.com/support.
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