# Install the ENA driver on EC2 Windows instances Install the ENA driver on Windows If your instance isn't based on one of the latest Windows Amazon Machine Images (AMIs) that Amazon provides, use the following procedure to install the current ENA driver on your instance. You should perform this update at a time when it’s convenient to reboot your instance. If the install script doesn’t automatically reboot your instance, we recommend that you reboot the instance as the final step. If you use an instance store volume to store data while the instance is running, that data is erased when you stop the instance. Before you stop your instance, verify that you've copied any data that you need from your instance store volumes to persistent storage, such as Amazon EBS or Amazon S3. ## Prerequisites To install or upgrade the ENA driver, your Windows instance must meet the following prerequisites: + PowerShell version 3.0 or later is installed. + The commands shown in this section must run in the 64-bit version of PowerShell. Do not use the `x86` version of PowerShell. That is the 32-bit version of the shell, and is not supported for these commands. ## Step 1: Back up your data We recommend that you create a backup AMI, in case you're not able to roll back your changes through the **Device Manager**. To create a backup AMI with the AWS Management Console, follow these steps: 1. Open the Amazon EC2 console at [https://console.aws.amazon.com/ec2/](https://console.aws.amazon.com/ec2/). 1. In the navigation pane, choose **Instances**. 1. Select the instance that requires the driver upgrade, and choose **Stop instance** from the **Instance state** menu. 1. After the instance is stopped, select the instance again. To create your backup, choose **Image and templates** from the **Actions** menu, then choose **Create image**. 1. To restart your instance, choose **Start instance** from the **Instance state** menu. ## Step 2: Install or upgrade your ENA driver You can install or upgrade your ENA driver with AWS Systems Manager Distributor, or with PowerShell cmdlets. For further instructions, select the tab that matches the method that you want to use. ------ #### [ Systems Manager Distributor ] You can use the Systems Manager Distributor feature to deploy packages to your Systems Manager managed nodes. With Systems Manager Distributor, you can install the ENA driver package once, or with scheduled updates. For more information about how to install the ENA driver package (`AwsEnaNetworkDriver`) with Systems Manager Distributor, see [Install or update packages](https://docs.aws.amazon.com/systems-manager/latest/userguide/distributor-working-with-packages-deploy.html) in the *AWS Systems Manager User Guide*. ------ #### [ PowerShell ] This section covers how to download and install ENA driver packages on your instance with PowerShell cmdlets. **Option 1: Download and extract the latest version** 1. Connect to your instance and log in as the local administrator. 1. Use the **invoke-webrequest** cmdlet to download the latest driver package: ``` PS C:\> invoke-webrequest https://ec2-windows-drivers-downloads.s3.amazonaws.com/ENA/Latest/AwsEnaNetworkDriver.zip -outfile $env:USERPROFILE\AwsEnaNetworkDriver.zip ``` **Note** If you receive an error when downloading the file, and you are using Windows Server 2016 or earlier, TLS 1.2 might need to be enabled for your PowerShell terminal. You can enable TLS 1.2 for the current PowerShell session with the following command and then try again: ``` [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 ``` Alternatively, you can download the latest driver package from a browser window on your instance. 1. Use the **expand-archive** cmdlet to extract the zip archive that you downloaded to your instance: ``` PS C:\> expand-archive $env:userprofile\AwsEnaNetworkDriver.zip -DestinationPath $env:userprofile\AwsEnaNetworkDriver ``` **Option 2: Download and extract a specific version** 1. Connect to your instance and log in as the local administrator. 1. Download the ENA driver package for the specific version you want from the version link in the [ENA Windows driver version history](ena-driver-releases-windows.md#ena-win-driver-release-history) table. 1. Extract the zip archive to your instance. **Install the ENA driver with PowerShell** The install steps are the same whether you've downloaded the latest driver or a specific version. To install the ENA driver, follow these steps. 1. To install the driver, run the `install.ps1` PowerShell script from the `AwsEnaNetworkDriver` directory on your instance. If you get an error, make sure that you’re using PowerShell 3.0 or later. 1. If the installer doesn’t automatically reboot your instance, run the **Restart-Computer** PowerShell cmdlet. ``` PS C:\> Restart-Computer ``` ------ ## Step 3 (optional): Verify the ENA driver version after installation To ensure that the ENA driver package was successfully installed on your instance, you can verify the new version as follows: 1. Connect to your instance and log in as the local administrator. 1. To open the Windows Device Manager, enter `devmgmt.msc` in the **Run** box. 1. Choose **OK**. This opens the Device Manager window. 1. Select the arrow to the left of **Network adapters** to expand the list. 1. Choose the name, or open the context menu for the **Amazon Elastic Network Adapter**, and then choose **Properties**. This opens the **Amazon Elastic Network Adapter Properties** dialog. **Note** ENA adapters all use the same driver. If you have multiple ENA adapters, you can select any one of them to update the driver for all of the ENA adapters. 1. To verify the current version that's installed, open the **Driver** tab and check the **Driver Version**. If the current version doesn't match your target version, see [Troubleshoot the Elastic Network Adapter Windows driver](troubleshoot-ena-driver.md). ## Roll back an ENA driver installation If anything goes wrong with the installation, you might need to roll back the driver. Follow these steps to roll back to the previous version of the ENA driver that was installed on your instance. 1. Connect to your instance and log in as the local administrator. 1. To open the Windows Device Manager, enter `devmgmt.msc` in the **Run** box. 1. Choose **OK**. This opens the Device Manager window. 1. Select the arrow to the left of **Network adapters** to expand the list. 1. Choose the name, or open the context menu for the **Amazon Elastic Network Adapter**, and then choose **Properties**. This opens the **Amazon Elastic Network Adapter Properties** dialog. **Note** ENA adapters all use the same driver. If you have multiple ENA adapters, you can select any one of them to update the driver for all of the ENA adapters. 1. To roll back the driver, open the **Driver** tab and choose **Roll Back Driver**. This opens the **Driver Package rollback** window. **Note** If the **Driver** tab doesn't show the **Roll Back Driver** action, or if the action is unavailable, it means that the [Driver Store](https://learn.microsoft.com/en-us/windows-hardware/drivers/install/driver-store) on your instance doesn't contain the previously installed driver package. To troubleshoot this issue, see [Troubleshooting scenarios](troubleshoot-ena-driver.md#ts-ena-drv-scenarios), and expand the **Unexpected ENA driver version installed** section. For more information about the device driver package selection process, see [How Windows selects a driver package for a device](https://learn.microsoft.com/en-us/windows-hardware/drivers/install/how-windows-selects-a-driver-for-a-device) on the *Microsoft documentation website*. # Track ENA Windows driver version releases ENA Windows driver releases Windows AMIs include the ENA Windows driver to enable enhanced networking. For Windows Server versions 2016 and above, we recommend that you use the latest driver version. For earlier versions of Windows Server, refer to the following table to determine which ENA driver version to use. | Windows Server version | ENA driver version | | --- | --- | | Windows Server 2012 R2 | 2.6.0 and earlier | | Windows Server 2012 | 2.6.0 and earlier | | Windows Server 2008 R2 | 2.2.3 and earlier | ## ENA Windows driver version history The following table summarizes the changes for each release. | Driver version | Details | Release date | | --- | --- | --- | | [2.11.0](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/x64/2.11.0/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | August 1, 2025 | | [2.10.0](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/x64/2.10.0/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | June 24, 2025 | | [2.9.0](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/x64/2.9.0/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | December 12, 2024 | | [2.8.0](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/x64/2.8.0/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | September 30, 2024 | | [2.7.0](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/x64/2.7.0/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | May 1, 2024 | | [2.6.0](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/x64/2.6.0/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | June 20, 2023 | | 2.5.0 | Announcement ENA Windows driver version 2.5.0 has been rolled back due to failure to initialize on the Windows domain controller. Windows Client and Windows Server are unaffected. | February 17, 2023 | | [2.4.0](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/x64/2.4.0/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | April 28, 2022 | | 2.2.4 | Announcement ENA Windows driver version 2.2.4 has been rolled back due to potential performance degradation on the sixth generation EC2 instances. We recommend that you downgrade the driver, using one of the following methods: [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | October 26, 2021 | | [2.2.3](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/x64/2.2.3/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) Announcement Windows ENA driver version 2.2.3 is the final version that supports Windows Server 2008 R2. Currently available instance types that use ENA will continue to be supported on Windows Server 2008 R2, and the drivers are available by download. No future instance types will support Windows Server 2008 R2, and you cannot launch, import, or migrate Windows Server 2008 R2 images to future instance types. | March 25, 2021 | | [2.2.2](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/2.2.2/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | December 21, 2020 | | [2.2.1](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/2.2.1/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | October 1, 2020 | | [2.2.0](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/2.2.0/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | August 12, 2020 | | [2.1.5](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/2.1.5/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | June 23, 2020 | | [2.1.4](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/2.1.4/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | November 25, 2019 | | [2.1.2](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/2.1.2/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | November 4, 2019 | | [2.1.1](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/2.1.1/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | September 16, 2019 | | [2.1.0](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/2.1.0/AwsEnaNetworkDriver.zip) | ENA Windows driver v2.1 introduces new ENA device capabilities, provides a performance boost, adds new features, and includes multiple stability improvements. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | July 1, 2019 | | [1.5.0](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/1.5.0/AwsEnaNetworkDriver.zip) | [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ena-driver-releases-windows.html) | October 4, 2018 | | [1.2.3](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/1.2.3/AwsEnaNetworkDriver.zip) | Includes reliability fixes and unifies support for Windows Server 2008 R2 through Windows Server 2016. | February 13, 2018 | | [1.0.8](https://s3.amazonaws.com/ec2-windows-drivers-downloads/ENA/1.0.8/AwsEnaNetworkDriver.zip) | The initial release. Included in AMIs for Windows Server 2008 R2, Windows Server 2012 RTM, Windows Server 2012 R2, and Windows Server 2016. | July 2016 | ## Subscribe to ENA Windows driver release notifications from Amazon SNS Subscribe to driver release notifications Amazon SNS can notify you when new versions of EC2 Windows Drivers are released. Use the following procedure to subscribe to these notifications. **Subscribe to EC2 notifications** 1. Open the Amazon SNS console at [https://console.aws.amazon.com/sns/v3/home](https://console.aws.amazon.com/sns/v3/home). 1. In the navigation bar, change the Region to **US East (N. Virginia)**, if necessary. You must select this Region because the SNS notifications that you are subscribing to are in this Region. 1. In the navigation pane, choose **Subscriptions**. 1. Choose **Create subscription**. 1. In the **Create subscription** dialog box, do the following: 1. For **TopicARN**, copy the following Amazon Resource Name (ARN): **arn:aws:sns:us-east-1:801119661308:ec2-windows-drivers** 1. For **Protocol**, choose `Email`. 1. For **Endpoint**, enter an email address where you want notifications sent. 1. Choose **Create subscription**. 1. You'll receive a confirmation email. Open the email and follow the directions to complete your subscription. Whenever new EC2 Windows drivers are released, we send notifications to subscribers. If you no longer want to receive these notifications, use the following procedure to unsubscribe. **Unsubscribe from Amazon EC2 Windows driver notification** 1. Open the Amazon SNS console at [https://console.aws.amazon.com/sns/v3/home](https://console.aws.amazon.com/sns/v3/home). 1. In the navigation pane, choose **Subscriptions**. 1. Select the checkbox for the subscription and then choose **Actions**, **Delete subscriptions**. When prompted for confirmation, choose **Delete**.