Discord is a chat app with a following of millions of users. It is available on nearly every platform, including PC. While the app itself is not harmful, there is always the potential for users to share harmful content, such as viruses, through the app. As such, it is important to be cautious when using Discord and to only accept files from trusted sources. If you are concerned about the safety of your PC, you can always take measures to protect your computer, such as installing antivirus software.