# EC2Launch version history
<a name="ec2launch-version-details"></a>

To download and install the latest version of EC2Launch, see [Install the latest version of EC2Launch](ec2launch-download.md).

The following table describes the released versions of EC2Launch.


| Version | Details | Release date | 
| --- | --- | --- | 
| 1.4.299 |  +  Optimized logic for retrieving EC2WinUtil driver version. <br />+  Reduced time to Windows is Ready by removing Hyper-V status query.   | 3 March 2026 | 
| 1.4.183 |  +  Updated installer logic to prevent unsupported installation on Windows Server 2022. <br />+  Updated to print EC2WinUtil driver version to instance console log.   | 4 February 2026 | 
| 1.4.6 |  +  Updated agent log messaging.   | 13 October 2025 | 
| 1.3.2005119 |  +  Fixed an issue where `Invoke-Userdata` would fail when called without any parameters.   | 11 February 2025 | 
| 1.3.2005065 |  +  Fixed an issue where RDP certificate information was not properly retrieved or validated. Added functionality to automatically start the Remote Desktop Services if needed.   | 22 October 2024 | 
| 1.3.2005008 |  +  Updated `Set-Wallpaper` to fall back to a solid color background if the default wallpaper image is not found.   | 6 August 2024 | 
| 1.3.2004959 |  +  Updated installer logic to prevent unsupported installation on Windows Server 2025 or later.   | 2 July 2024 | 
| 1.3.2004891 |  +  Fixed an issue where `HandleUserData` was not set to `false` as expected. <br />+  Added an `Encrypted` password option to `LaunchConfig.json`. <br />+  Changed `Settings UI` behavior to encrypt the user specified password by default. <br />+  Added `SetAdminPasswordConfig.ps1` to convert the `Specify` password option to the `Encrypted` password option in the agent configuration file.   | 31 May 2024 | 
| 1.3.2004617 |  +  Fixed an error when setting the wallpaper.   | 15 January 2024 | 
| 1.3.2004592 | +  Updated access permissions set by install.ps1 for `%ProgramData%\Amazon\EC2-Windows\Launch`. <br />+  Restricted EC2Launch folder/file access to read-execute only for standard user accounts. <br />+  Changed the agent to stop waiting for the Instance Metadata Service (IMDS) to initialize if IMDS is not enabled for the instance. <br />+  Added a five minute timeout when waiting for the IMDS to initialize. <br />+  Changed the agent to write telemetry to the instance console log before the `Windows is Ready` message instead of after. <br />+  Added wallpaper support to several new instance types. For more information about access permissions and user account permissions of EC2Launch directories, see [EC2Launch directory structure](ec2launch.md#ec2launch-directories). | 2 January 2024 | 
| 1.3.2004491 | +  Added telemetry to monitor usage of the **Specify admin password** option.  | 9 November 2023 | 
| 1.3.2004462 | +  Added flush after every write to the serial console.  | 18 October 2023 | 
| 1.3.2004438 | +  Limit domain name devolution based on registry entry: `HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Dnscache\Parameters\DomainNameDevolutionLevel`. <br />+  Limited `UserdataExecution.log` permissions to `Administrators` only. <br />+  Added error messages in the Windows Event Log when log initialization fails.  | 4 October 2023 | 
| 1.3.2004256 | +  Added `EnableSCSIPersistentReservations` value to console log. <br />+  Added retry capability for **Get-ConsolePort**.  | 7 July 2023 | 
| 1.3.2004052 | +  Fixed an error that occurred when no SSH key is specified at instance launch. <br />+  Updated to retry starting the AmazonSSMAgent Windows service on failure. <br />+  Updated to fail SysprepInstance.ps1 if BeforeSysprep.cmd fails with a non-zero exit code.  | 8 March 2023 | 
| 1.3.2003975 | +  Fixed issue impacting Packer AMI builds where `SysprepInstance.ps1` returns a `$LastErrorCode` of 1.  | 24 December 2022 | 
| 1.3.2003961 | +  Fixed issue where explicitly specified administrator passwords are overwritten with a random password on fast-launched instances. <br />+  Fixed issue where SSM Agent fails to start on smaller instance types. <br />+  Fixed an issue where the instance console log contains `RDPCERTIFICATE-THUMBPRINT: 00000000000000000000000` instead of a valid RDP certificate thumbprint value.  | 6 December 2022 | 
| 1.3.2003923 | +  Fixes logic for finding network adapter when PnPDeviceID is empty.  | 9 November 2022 | 
| 1.3.2003919  | +  Updated Get-ConsolePort to use PCI segment information. <br />+  Fixed issue where an incorrect network adapter can be selected after reboot. <br />+  Fixed start-SSM-Agent timeout logic. <br />+  Fixed backwards compatibility for Send-AdminCredentials function alias.  | 8 November 2022 | 
| 1.3.2003857 | +  Prioritizes adapters with a default gateway when the primary network adapter is selected.  <br />+  Extended in-memory password encryption.  | 3 October 2022 | 
| 1.3.2003824 | +  Fixed error during `setComputerName`. <br />+  Added logic to skip Windows activation when a BYOL billing code is detected. <br />+  Added in-memory password encryption. <br />+  Fixed error during volume initialization on `m6id.4xlarge`.  | 30 August 2022 | 
| 1.3.2003691 | +  Updated IMDS wait logic to make only IMDSv2 requests. <br />+  Fixed bug impacting eGPU installation.  | 21 June 2022 | 
| 1.3.2003639 | +  Added network-adapter wait logic to prevent use before initialization. <br />+  Fixed minor issues.  | 10 May 2022 | 
| 1.3.2003498 | +  Added telemetry. <br />+  Added shortcut to Settings UI. <br />+  Formatted PowerShell scripts. <br />+  Fixed issue with shutdown occurring before BeforeSysprep.cmd completes.  | 31 January 2022 | 
| 1.3.2003411 | Changed password generation logic to exclude passwords with low complexity. | 04 August 2021 | 
| 1.3.2003364 | Updated Install-EgpuManager with IMDSv2 support. | 07 June 2021 | 
| 1.3.2003312 |  +  Added log lines before and after `setMonitorAlwaysOn` setting. <br />+  Added AWS Nitro Enclaves package version to console log.   | 04 May 2021 | 
| 1.3.2003284 | Improved permission model by updating location for storing user data to LocalAppData. | 23 March 2021 | 
| 1.3.2003236 | +  Updated method for setting user password in `Set-AdminAccount` and `Randomize-LocalAdminPassword`. <br />+  Fixed`InitializeDisks` to check whether disk is set to read only before setting it to writable.  | 11 February 2021 | 
| 1.3.2003210 | Localization fix for install.ps1. | 7 January 2021 | 
| 1.3.2003205 | Security fix for install.ps1 to update permissions on %ProgramData%AmazonEC2-WindowsLaunchModuleScripts directory. | 28 December 2020 | 
| 1.3.2003189 | Added w32tm resync after adding routes. | 4 December 2020 | 
| 1.3.2003155 | Updated instance type information. | 25 August 2020 | 
| 1.3.2003150 | Added OsCurrentBuild and OsReleaseId to console output . | 22 April 2020 | 
| 1.3.2003040 | Fixed IMDS version 1 fallback logic. | 7 April 2020 | 
| 1.3.2002730 | Added support for IMDS V2. | 3 March 2020 | 
| 1.3.2002240 | Fixed minor issues.  | 31 October 2019 | 
| 1.3.2001660 | Fixed automatic login issue for users without password after first time executing Sysprep.  | 2 July 2019 | 
| 1.3.2001360 | Fixed minor issues.  | 27 March 2019 | 
| 1.3.2001220 | All PowerShell scripts signed.  | 28 February 2019 | 
| 1.3.2001200 | Fixed issue with InitializeDisks.ps1 where running the script on a node in a Windows Server Failover Cluster would format drives on remote nodes whose drive letter matched the local drive letter.  | 27 February 2019 | 
| 1.3.2001160 | Fixed missing wallpaper in Windows 2019. | 22 February 2019 | 
| 1.3.2001040 |  +  Added plugin for setting the monitor to never turn off to fix ACPI issues. <br />+  SQL Server edition and version written to console.   | 21 January 2019 | 
| 1.3.2000930 | Fix for adding routes to metadata on ipv6-enabled ENIs.  | 2 January 2019 | 
| 1.3.2000760 |  +  Added default configuration for RSS and Receive Queue settings for ENA devices.  <br />+  Disabled hibernation during Sysprep.   | 5 December 2018 | 
| 1.3.2000630 |  +  Added route 169.254.169.253/32 for DNS server. <br />+  Added filter of setting Admin user. <br />+  Improvements made to instance hibernation. <br />+  Added option to schedule EC2Launch to run on every boot.   | 9 November 2018 | 
| 1.3.2000430.0 |  +  Added route 169.254.169.123/32 to AMZN time service. <br />+  Added route 169.254.169.249/32 to GRID license service. <br />+  Added timeout of 25 seconds when attempting to start Systems Manager.    | 19 September 2018 | 
| 1.3.200039.0 |  +  Fixed improper drive lettering for EBS NVME volumes. <br />+  Added additional logging for NVME driver versions.   | 15 August 2018 | 
| 1.3.2000080 | Fixed minor issues. |  | 
| 1.3.610 | Fixed issue with redirecting output and errors to files from user data. |  | 
| 1.3.590 |  +  Added missing instances types in the wallpaper. <br />+  Fixed an issue with drive letter mapping and disk installation.   |  | 
| 1.3.580 |  +  Fixed `Get-Metadata` to use the default system proxy settings for web requests. <br />+  Added a special case for NVMe in disk initialization. <br />+  Fixed minor issues.   |  | 
| 1.3.550 | Added a `-NoShutdown` option to enable Sysprep with no shutdown. |  | 
| 1.3.540 | Fixed minor issues. |  | 
| 1.3.530 | Fixed minor issues. |  | 
| 1.3.521 | Fixed minor issues. |  | 
| 1.3.0 |  +  Fixed a hexadecimal length issue for computer name change. <br />+  Fixed a possible reboot loop for computer name change. <br />+  Fixed an issue in wallpaper setup.   |  | 
| 1.2.0 |  +  Update to display information about installed operating system (OS) in EC2 system log. <br />+  Update to display EC2Launch and SSM Agent version in EC2 system log. <br />+  Fixed minor issues.   |  | 
| 1.1.2 |  +  Update to display ENA driver information in EC2 system log. <br />+  Update to exclude Hyper-V from primary NIC filter logic. <br />+  Added AWS KMS server and port into registry key for KMS activation. <br />+  Improved wallpaper setup for multiple users. <br />+  Update to clear routes from persistent store. <br />+  Update to remove the z from availability zone in DNS suffix list. <br />+  Update to address an issue with the <runAsLocalSystem> tag in user data.   |  | 
| 1.1.1 | Initial release. |  |