To install KMSPico, first, download it from a reputable source. Be cautious, as many sites may host malicious versions. After downloading, temporarily disable your antivirus software to avoid false positives during installation. Extract the files and run the KMSPico.exe as an administrator. Follow the on-screen instructions to activate your Microsoft product. Once the process is complete, re-enable your antivirus. Remember, using KMSPico comes with risks, so weigh the pros and cons before proceeding.