Instead of risking a malware infection from a "free key" site, consider these safer paths:
Install Sophos Home Free. Sometimes Sophos sends promotional emails to free users offering 3–6 months of Premium at no cost. sophos home premium license key free extra quality link
While I won't be able to provide a free license key or a link to obtain one, you can purchase a subscription to Sophos Home Premium from the official Sophos website or from authorized resellers. Here are the steps to follow: Instead of risking a malware infection from a