Last Updated on February 13, 2022 by sandeeppote
If you see this error whilst installing Sitecore 9.0.2 the issue might be due to multiple certificates been issues.
![](https://sandeeppote.com/wp-content/uploads/2021/08/image.png)
In this case delete both certificates listed –
Get-ChildItem Cert:\LocalMachine\Root\<<Thumbprint>> | Remove-Item
Try the installation again
ERROR-
![](https://sandeeppote.com/wp-content/uploads/2021/08/image-1.png)
SOLUTION-
Check and remove – DO_NOT_TRUST_SitecoreRootCert if its expired from Local Computer and Current User.
Also remove the same form the dis mainly from C:\certificates
ERROR-
![](https://sandeeppote.com/wp-content/uploads/2021/08/image-2.png)
SOLUTION-