Microsoft provides Windows PE officially and legally. However, downloading a "cracked" or "modded" Windows 10 ISO that claims to be "Mini" usually violates Microsoft’s Terms of Service regarding the modification and distribution of their software.
Some low-quality antivirus programs (e.g., Avast, McAfee) flag modified Windows ISOs as "hacktools." This is often a false positive because the ISO modifies system files. However, if you downloaded from a sketchy torrent, assume it is real malware. Only trust ISOs from verified sources with SHA-256 checksums. mini windows 10 bootable iso download
By design, many Mini Windows 10 builds disable Windows Update to save space. To update, you usually need to download a cumulative update .msu file manually from Microsoft Update Catalog. Alternatively, accept that you run a "frozen" OS. Microsoft provides Windows PE officially and legally