Downloading KMS activator from unofficial sources can pose significant security risks. Many third-party websites may host modified or infected versions of the software, which can lead to malware infections or data breaches. It is crucial to ensure that any activator is downloaded from a reputable source. Using official Microsoft tools and services is always recommended for activation, as they are safer and comply with licensing agreements. If you choose to use KMS activator, take extra precautions, such as running antivirus software and scanning downloads before installation.