ThinOS 9.1.3129 or later to ThinOS 2308 (9.4.3087) Upgrade Image file

Restart required AUTO 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 2308 (9.4.3087) Image file for Dell Wyse 3040, 5070, 5470 and 5470 All-In-One Thin Clients, OptiPlex 3000 Thin Client, Latitude 3420, 3440, 5440, OptiPlex 5400 All-In-One, and OptiPlex All-in-One 7410. This image is intended for customers who want to upgrade from ThinOS 9.1.3129 or later to ThinOS 2308 (9.4.3087).
To view all drivers for your Wyse 5070 Thin Client, go to Drivers and downloads.
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Find more updates. Use SupportAssist to find all the latest driver updates for your device.

Fixes & Enhancements

- Added the battery capacity checking feature before the system is updated.
- Updated the Scheduled App policy.
- Updated the Dell Loading logo screen.
- Added the Activation License field in the About tab on System Information.
- Added input validation for Queue field in Printer settings.
- Added input validation for Name field in Local Printer settings.
- Added input validation for Local Name field in SMB Printer settings.
Read More


2308 (9.4.3087), 2308 (9.4.3087)

Release date

31 Aug 2023

Download Type

Operating Systems


Operating System


Dell 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.

Additional details

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- Do not power off your thin client until the installation is complete.
- If you are using ThinOS 8.6 or earlier versions of ThinOS 9.x, you must first upgrade to ThinOS 9.1.3129 or later versions before upgrading to ThinOS 2308.
- Before upgrading from ThinOS 9.x to later versions, ensure that your system is powered on, and the sleep mode is disabled on the system. If the system has entered the sleep mode, you must send the Wake-on-LAN command through Wyse Management Suite before using any real-time commands. To use the Wake-on-LAN command, ensure that the Wake-on-LAN option is enabled in BIOS.
- You cannot boot into ThinOS 2308 (9.4.3087) 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.
- The upgrade may fail if the event log fails to install. In such an event, you may reboot the device and upgrade again.
- After upgrading to ThinOS 2205 or later, all application packages earlier than 2205 are removed automatically and cannot be installed again. You must install the latest application packages.

For more information about the updates, see the Dell ThinOS 2308, 2306 and 2303 Release Notes at
2402 (9.5.1079)29 Feb 2024
2311 (9.4.4123)03 Jan 2024
2311 (9.4.4106)01 Dec 2023
2306 (9.4.2103)30 Jun 2023
2303 (9.4.1141)31 Mar 2023
2211 (9.3.3099)07 Dec 2022
2208 (9.3.2102)30 Aug 2022
2205 (9.3.1129)29 May 2022
9.1.610828 Feb 2022
9.1.506713 Dec 2021
9.1.423425 Oct 2021
9.1.312907 Sep 2021
9.1.311216 Jul 2021
9.1.210114 Apr 2021
Upgrade ThinOS firmware through Wyse Management Suite:

- Ensure that you are running ThinOS 9.1.3129 or later version on your thin client.
- Create a group in Wyse Management Suite with a group token.
- The thin client must be registered to Wyse Management Suite.
- Download the ThinOS 2308 (9.4.3087) firmware to upgrade.

1. Go to the Groups & Configs page and select a group.
2. From the Edit Policies drop-down menu, click ThinOS 9.x. The Configuration Control | ThinOS window is displayed.
3. In the left pane, click Standard.
4. From the Standard menu, expand Firmware, and click OS Firmware Updates.
NOTE: If you cannot locate the OS Firmware Updates option under the Standard tab, use the Advanced tab.
5. Click Browse and select the ThinOS firmware to upload.
6. From the Select the ThinOS Firmware to deploy drop-down menu, select the uploaded firmware.
7. Click Save & Publish.
The thin client downloads the firmware to install and restarts. The firmware version is upgraded.
1. There are chances that the upgrade might fail with event log stating Failed to install. In such an event, you may reboot the device and upgrade again.
2. After upgrading to ThinOS 2308, all application packages earlier than 2205 are removed automatically. You must install the latest application packages.
3. There are chances that the ThinOS background might be in blue color and some features may not work. In this
case, you have to reboot the device.

For more information about how to install the ThinOS 2308 (9.4.3087) image, see the Dell ThinOS 2308, 2306 and 2303 Migration Guide at

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