The standard installer downloaded from the main website is often a small "stub" that requires an internet connection to fetch the rest of the software. To get a true offline installer:
Avoid downloading or running any unsigned, third-party “hot” Kaspersky installers. If you already downloaded one, do not run it — scan it with multiple antivirus tools (ironically, using a different vendor’s live USB scanner). If you need a free offline antivirus, consider legitimate alternatives like Kaspersky Free (official offline version) or Bitdefender Free. kaspersky total security offline installer hot