Because KMSpico is not an official piece of software, it is distributed through third-party websites. Many of these "activators" are bundled with . Antivirus programs (including Windows Defender) will almost always flag KMSpico as a "HackTool" or "Trojan." While some users claim these are false positives, downloading these files opens a back door to your system. 2. System Instability

Do not download KMSpico from just any link if it wasn't already obvious

KMSpico official is a popular tool used to activate Windows and Microsoft Office products without needing a paid license. The Hellenic Initiative brian8544/KMSpico: Microsoft Windows & Office ... - GitHub