El problema es que cada vez que intento descargar algun programa de terceros manda un error de descarga y la ventana se congela, intente actualizar los repositorios pero no se resolvio.
Support is only provided in English.
Assuming I understand you correctly. The third party section is not actually part of the repository, it downloads and repackages applications on users systems in real time directly from the applications website. You can install the apps in the third party section from the command line if the software center is freezing for you. https://getsol.us/articles/software/third-party/en/
Note about third party applications:
Spotify servers have been terrible for months. Downloading fails with an error similar to "transfer closed with 133193288 bytes remaining to read" there is nothing that can be done other than re-trying and hope for the best. It is an issue on spotify's end. Users of Arch's AUR have been complaining about the issue too. I would recommend using the snap or flatpak instead for spotify.
Bigwig-studio is currently broken failing the hash check, this issue was only just reported today and will be resolved when people have a chance to look at it.
This issue has been deemed by the developers to be a general support query. To facilitate discussions around development and development-related topics, support queries should be posted to our Community Forum, accessible at https://discuss.getsol.us
We encourage you to post your support query on our Community Forums to enable our community to assist you to resolve your issue. You can sign in to our Community Forums with a multitude of supported authentication systems, which includes your Solus Development Tracker (Phabricator) account, GitHub account, or traditional sign-up via email and password.
Should you consider your issue / support query to be urgent, you can also attempt to use our support-specific IRC channel with the pre-installed IRC client (Hexchat or Konversation based on your installed Solus edition). You may find more details at https://getsol.us/articles/contributing/getting-involved/en/#irc