Almost all antivirus programs (including Windows Defender) will flag this tool as a "HackTool" or "PUP" (Potentially Unwanted Program). This is expected behavior for activation bypass tools.

Kmsoffline V2.4.1 -windows Office Activator- ... [Latest]

Almost all antivirus programs (including Windows Defender) will flag this tool as a "HackTool" or "PUP" (Potentially Unwanted Program). This is expected behavior for activation bypass tools.