Make sure that your computer is up to date, how can it solve that?
In order for us to provide better support, we need to see the log generated by Citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File.
Please show a screenshot of the error. By your description it could be that your gpu does not support open gl 4.5 or your gpu drivers are old or maybe it’s an old Windows that doesn’t have internet explorer 11 or newer installed