This article deals with specific error messages you may encounter when using the launcher, and how to solve them. If you're having trouble downloading Elite Dangerous using the launcher please see this FAQ article.
TECHNICAL ERROR MESSAGES
|Unhandled exception: The process cannot access ***** because it is being used by another process.||Restart your computer completely.|
|Update failed for file ***** (validation error)||Follow the steps in this FAQ article.|
|Failed to read from response stream. Network connection closed.||Follow the steps in this FAQ article.|
|Incorrect manifest checksum.||Follow the steps in this FAQ article.|
|Unhandled exception during project update. Access to path ***** is denied||The launcher was unable to access the installation folder. This is likely caused by Windows file permissions problems which you can help fix by checking this FAQ article.|
|Unhandled exception during project update: object reference not set to an instance of an object.||There may be a problem with your launcher or Microsoft .Net installations. Please see the relevant steps in this FAQ article.|
|Incorrect Manifest Checksum
||Follow the steps in this FAQ article.|
|Invalid Credentials||This message occurs if your login details are incorrect. Please ensure you're entering your email address and password correctly. If you've forgotten your password, you can reset it here. If you require assistance recovering your account, please follow the steps outlined in this FAQ article.|
|Unable to confirm Steam product access||Please see this FAQ.|
If you have an error that is not included in this article, please try searching the support site for our other useful articles. Should you not be able to find a solution to your problem, or if you need assistance with anything mentioned here, please create a ticket using the button below and the support team will be able to assist you further.