I am writting this email to ask for help because I am in a competition to creat a game in one mounth.I was recomanded to use unity by the organisators.I downloaded the app but when I was tryng to install the editator it always tells me “Install failed: Validation Failed”.I tried methods that i found on the internet but nothing works.I really need to start whith the game and it will be wonderfull if you can help me.
I do not know what “it did not work” means but lets assume it means you received exactly the same error. Can you get a hold of an earlier version of Unity Hub?
No, but to the same extent, I have 6 installed. So the download is solid, something else must be an issue and what really is needed is the errors from the hub logs/install/event logs, and not just blaming it on a version of unity, if it couldnt be installed there would be a lot of people, if theres only a few, it is likely a machine issue
I really do understand… help the guy please. You can see he has a deadline and he would theoretically need a working copy of Unity installed in order to participate.
Well it may not be easy to find. Did you use a search engine? Did it show any other messages from users asking similar questions?
You didn’t reply to my “it did not work” comment. Like what didn’t work? Are other people you know installing Unity without issue? Have previous versions worked?
Have you tried deleting your failed Unity 6 installation and then trying again? If part of the download was corrupted, this might resolve your issue. You can delete the installation by clicking the SETTINGS icon on the Hub > Installs page and selecting Uninstall. Alternatively, clicking the Locate button will take you to the folder containing the install where you can delete it manually.
If you want to try installing a different Editor build version, or you want to download and install the Unity Editor outside of the Unity Hub, click on the Hub > Installs > Install Editor button then navigate to the Archive tab and click on the Archive link to take you to a page where you can install or download other versions.
The “Install Failed: Validation Failed” error is often linked to system, network, or configuration issues on the machine. If Laurie’s solution didn’t help, here’s a guide to potential causes and fixes:
Key Troubleshooting Steps
System Requirements & Drive Location
Confirm that your machine meets the minimum system requirements for Unity.
Try installing on an internal drive rather than an external one, as this can help avoid read/write errors.
Permissions
Run Unity Hub with administrative privileges to avoid permission blocks. Right-click the Hub shortcut and select Run as Administrator.
Network Stability
For a stable connection, use Ethernet over Wi-Fi if possible, turn off any VPN, and remove data limits.
Allow Unity Hub access through your firewall, making sure ports 80 and 443 are open.
Antivirus & Proxy Settings
Temporarily disable antivirus or firewall during installation, or add Unity-related URLs (e.g., unity.com, unity3d.com, plasticscm.com) to the exceptions list in security software.
Machine-specific Configurations
Check for unusual configurations like non-Latin characters in file paths, or a modified PATH environment variable, as these can interfere with the install process.
If none of these steps work, try downloading Unity directly from the Unity Download Archive, or perform a clean installation to ensure no conflicting files are left behind.
Quick comment… due to all the chat about Unity 6 I decided that I needed to “bite the bullet” and give it a try. It installed for me without a hitch and it converted a project written using 2021.3. Now I have to try to remember what all I did in that project and prepare to test things again.