Kaspersky has one of the best malware-detection engines of any consumer antivirus maker, and the engine is shared by all Kaspersky Windows antivirus products.

Kaspersky Security Cloud Free: Antivirus performance Right-clicking a specific object in Windows Explorer lets you scan it, and when you plug in a USB flash drive, Kaspersky Security Cloud Free scans it behind the scenes. A Full Scan is two clicks from Kaspersky's main page, and a Quick Scan is one more click. If the scanning gets in the way of gaming or watching video, Kaspersky Security Cloud Free's gaming mode can reduce interruptions. On the downside, Kaspersky Security Cloud Free has no specific defense against UEFI penetration of the system's start-up program. The latest version of Kaspersky Security Cloud Free includes a tool called System Watcher that watches for ransomware attacks and can reverse changes to files. Whether you get Kaspersky Security Cloud Free or pay for Kaspersky software, you get the same excellent protection against malware. Kaspersky Security Cloud Free: Antivirus protection We have not seen any convincing evidence that Kaspersky does so, and we think the software is fine for civilian use. government agencies and defense contractors, and there have been allegations that the Moscow-based company spies on behalf of the Russian authorities. Kaspersky software is banned for use by U.S. It starts at $60 per year for three computers and adds a system optimizer and specialized defenses against ransomware, phishing and spyware.

It's for PCs only, but we think it's the best Windows 10 antivirus program available. Kaspersky's cheapest paid antivirus program is Kaspersky Anti-Virus. Kaspersky Security Cloud Free is not always easy to find on the Kaspersky website, but the download link is here (opens in new tab). You'll need to use an older version for Windows XP or Vista. The free program not only blocks online attacks but includes limited access to the company's Secure Connection VPN.

Kaspersky Security Cloud Free uses the same malware-scanning engine as the company's paid products. Upsell nag factor: Moderate Kaspersky Security Cloud Free: What's covered and upgrade options

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