--- title: How to Troubleshoot the Unable to Start SOLIDWORKS Design Error Message description: "Troubleshooting the \"Unable to Start SOLIDWORKS Design\" - Learn how to resolve this issue by modifying the SW_Login_Disable registry key to enable successful authentication of your SOLIDWORKS Design Named User License product." --- [Skip to content](https://support.swyftsol.com/knowledge-base/how-to-troubleshoot-the-unable-to-start-solidworks-connected-error-message#main-content) [Client Portal](https://support.swyftsol.com/tickets?hsLang=en) [![SWYFT Solutions Logo](https://support.swyftsol.com/hs-fs/hubfs/Email%20Signature%20Images/SWYFT%20Solutions%20Logo_Email%20Signature.png?width=125&height=44&name=SWYFT%20Solutions%20Logo_Email%20Signature.png)](https://www.swyftsol.com/) - [SWYFT Solutions Home](https://www.swyftsol.com/) Open main navigation Close main navigation - [SWYFT Solutions Home](https://www.swyftsol.com/) - [Client Portal](https://support.swyftsol.com/tickets) How can we help you? - There are no suggestions because the search field is empty. 1. [SWYFT Solutions Knowledge Base](https://support.swyftsol.com/knowledge-base?hsLang=en) 2. [Troubleshooting](https://support.swyftsol.com/knowledge-base/troubleshooting?hsLang=en) # How to Troubleshoot the Unable to Start SOLIDWORKS Design Error Message ## This article provides a troubleshooting guide for the error message "Unable to Start SOLIDWORKS Design - We are unable to authenticate your SOLIDWORKS Design license..." encountered when launching SOLIDWORKS Design. **Important note:** Starting November 15th, 2025, SOLIDWORKS has updated its product names. This article applies to **SOLIDWORKS Design Named User Licenses**. If you were using **3DEXPERIENCE SOLIDWORKS** (also known as **SOLIDWORKS Connected**), you can continue with these instructions, as the steps will be the same. If you are encountering the following error message when trying to launch SOLIDWORKS Design, read below for trouble shooting steps. ![](https://support.swyftsol.com/hs-fs/hubfs/image-png-Nov-14-2025-07-46-35-4964-PM.png?width=564&height=248&name=image-png-Nov-14-2025-07-46-35-4964-PM.png) ### **Cause** This issue can occur when the registry key **SW\_Login\_Disable** is set to **True**, preventing authentication of the SOLIDWORKS Design license. ### Resolution **Caution:** Modifying the Windows Registry can cause serious system instability if done incorrectly. Full administrative permissions are required to make these changes. Proceed with caution and back up your registry before making any edits. SWYFT Solutions is not responsible for any issues resulting from registry modifications. This guide is provided for informational purposes only. If unsure, consult your IT administrator before proceeding. ### **Step 1: Open Registry Editor** 1. In Windows search, search and open **Registry Editor**. ### **Step 2: Modify the Registry Key** 1. In **Registry Editor**, go to the following location: 1. HKEY\_CURRENT\_USER\\Software\\Dassault Systemes\\SOLIDWORKSPDM\\Servers\\3DEXPERIENCE\\ 2. Locate the **SW\_Login\_Disable** key. 3. If its value is set to **True**, change it to **False**. ![](https://support.swyftsol.com/hs-fs/hubfs/image-png-Mar-13-2025-09-47-45-9178-PM.png?width=670&height=387&name=image-png-Mar-13-2025-09-47-45-9178-PM.png) ### **Step 3: Restart SOLIDWORKS Design** 1. Close **Registry Editor**. 2. Start **SOLIDWORKS Design f**rom the [platform](https://eu1-ifwe.3dexperience.3ds.com/). After completing these steps, **SOLIDWORKS Design** should launch without the authentication error. If you are still experiencing issues, please contact the **SWYFT Support team at [support@swyftsol.com](mailto:support@swyftsol.com)** for assistance. - [FAQs](https://support.swyftsol.com/knowledge-base/faqs?hsLang=en) - [Getting started](https://support.swyftsol.com/knowledge-base/getting-started?hsLang=en) - [Troubleshooting](https://support.swyftsol.com/knowledge-base/troubleshooting?hsLang=en) - [General](https://support.swyftsol.com/knowledge-base/general?hsLang=en#main-content) - [Update](https://support.swyftsol.com/knowledge-base/general?hsLang=en#update) - [Account](https://support.swyftsol.com/knowledge-base/account?hsLang=en) - [Settings](https://support.swyftsol.com/knowledge-base/settings?hsLang=en) [![SWYFT Solutions Logo](https://support.swyftsol.com/hs-fs/hubfs/Email%20Signature%20Images/SWYFT%20Solutions%20Logo_Email%20Signature.png?width=125&height=44&name=SWYFT%20Solutions%20Logo_Email%20Signature.png "SWYFT Solutions Logo")](https://www.swyftsol.com)