Explanation If a rootkit has caused a deep infection, then the only way to remove the rootkit is to reinstall the operating system. This is because rootkits are designed to be difficult to detect and remove, and they can hide in the operating system's kernel, making it difficult to remove them without reinstalling the operating system https://www.minitool.com/backup-tips/how-to-get-rid-of-rootkit-windows-10.html