Both Skype and Discord are easy targets for hackers if you do not secure your ports and only open the ports you are using and close them once done.
Any software that use a known port will be an easy target for hackers and even if not known, it will be dangerous too because hackers scan for open ports
All you need is a good premium anti-spywares, malwares and anti-virus
It would be great if you learn how to professionally use a firewall so you can open/block ports when needed/not needed.