But please, skip the "free key." Either support the developer for a few dollars, or stick to Windows Defender (which is actually excellent now). Your data is worth more than a cracked license.
While the software was fantastic in 2020, viruses have evolved. Smadav 13.5.0 doesn't understand modern ransomware variants or polymorphic malware. Using an outdated antivirus is arguably worse than using no antivirus at all, because it gives you a false sense of security. Smadav Pro 2020 Rev. 13.5.0 with Key
But back in 2020, one little blue icon tried to do things differently: But please, skip the "free key