Microsoft Security Intelligence Report

Welcome to the interactive Microsoft Security Intelligence Report. We created this site as a complement to our annual report to enable you to dig into the data in more detail.

Some key highlighted takeaways may differ from the written report as we add new data monthly. Come back and visit often to check in on the latest security trends.

For a deeper assessment and recommendations on how to protect against threats, download the Microsoft Security Intelligence Report at

Malware encounter rates

Good computer hygiene helps to mitigate the risks of malware. Typically, when we see high rates of malware, it’s a result of poor security hygiene and low user security education and awareness. Using unlicensed and/or pirated software can also be a source of malware. Sources that illegitimately offer free software or content, such as streaming videos, will often include malware. Some potential reasons for the overall decrease in malware encounter rates in 2018 are the growth in adoption of Windows 10, and increased use of Windows Defender for protection.

Even if there is an intermittent slowdown in malware encounter rates, attackers don’t stand still – rather, they continue to evolve their techniques.

The graph and map on the right show the monthly average percentage of machines that encountered malware for the timeframe and country/countries selected. Toggle between Worldwide and Country Comparison for a detailed view of the countries you’ve selected.

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Click to interact with Malware encounters dashboard
Click to interact with dashboard