Best Security & Anti-Virus Software Coupons & Promo Codes for September 2026

Microsoft Windows 11 Pro is $9.97 at StackSocial, down from $199. This is a lifetime license installed on one PC with no subscription required. The Pro version adds BitLocker encryption, Hyper-V virtual machine support, and Azure AD business identity tools on top of the standard Windows 11 features. Buy Now at StackSocial

You can get an extra $17 off this Malwarebytes Standard antivirus software with promo code "BTSF3742", bringing a 3-device, 1-year license down to $13.  Buy Now at Newegg

StackSocial's Deal Days Extended sale covers software, subscriptions, and refurbished tech at discounted prices. Microsoft Windows 11 Pro is listed at $9.97, and AdGuard DNS Personal is down to $24.97 for a 5-year subscription. The sale also includes refurbished Apple MacBook Pro laptops starting at $369.99, alongside VPN services, cloud storage plans, and AI tools.  Shop Now at StackSocial

Amazon offers the Norton 360 Premium Antivirus for 10 Devices for $30. Save $70 compared to both the list and typical prices on this comprehensive antivirus and security suite, offering protection for 10 devices with advanced features and a VPN. Buy Now at Amazon

Squarespace's website builder plans are 50% off with promo code "SQSP50", covering the Core, Plus, and Advanced tiers. Blueprint AI, Squarespace's AI-guided builder, asks a handful of questions and instantly spins up unique web designs, including imagery curated by the company's own designers, so users can tweak pages rather than start from scratch. The tool earned a spot on TIME's Best Inventions of 2025. Shop Now at Squarespace

Apply promo code "FTTF493" at Newegg to drop the ESET Home Security Essential 2026 1-Year Subscription for three devices down to just $10. It would cost you $35 for the same bundle at Amazon today. Buy Now at Newegg

That's 85% off at a savings of $770. Buy Now at StackSocial

Score deep discounts across a wide range of apps and software, with prices slashed by as much as 98%. The sale includes lifetime licenses and long-term subscriptions on categories like productivity software, operating systems, security tools, cloud storage, and learning apps. Shop Now at StackSocial

Anyone managing cloud infrastructure or studying for Azure certification will find this a useful reference for getting up to speed on IaaS fundamentals, and it's $9.05 off the $22.99 list price at Amazon. Buy Now at Amazon

Anyone needing solid malware protection without the bloat of a full security suite will find this covers the basics well, and at $24 it's $16 off the usual $40 price. Buy Now at Best Buy

This suits anyone streaming or browsing on shared Wi-Fi who wants encrypted traffic across multiple devices, since one subscription covers up to 10 at once. At $30, that's $55 (65%) off the $85 list price. Buy Now at Amazon

Covers three devices for two full years, which suits households juggling multiple laptops and phones under one plan instead of separate licenses. At $45, that's $35 (44%) off the $80 list price. Buy Now at Best Buy

Anyone streaming or browsing on public Wi-Fi gets solid encryption coverage here, useful for travelers or coffee shop workers who want their connection locked down without a long-term commitment. It's $2 off the usual monthly rate. Buy Now at Amazon

Anyone covering multiple Windows PCs in a household can put this to use, since it handles three devices under one plan for two full years without needing to renew annually. At $60, that's $40 off the $100 list price, roughly 40% less. Buy Now at Best Buy