From my experience, it could be a compatibility issue with the OS and the server software or a network issue. Have you tried reaching out to the server software support for a solution?
In the meantime, ensure all your drivers and software are up to date and perform a network diagnostic to see if there's any issue with your internet connection. If everything checks out, you might want to consider downgrading back to an older version of Windows that works well with the server.
If you want a new comp or upgrade to Win10, you can grab some cheap windows keys on Reddit.
