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Trick, treat, repeat
Welcome to this week's edition of the Threat Source newsletter. This one is pretty much an updated, Halloween-themed version of my newsletter from July, including data up through Q3. October 14th has passed, so free support for Windows 10 has come to an end, leaving you with no more fixes unless...
Patch Tuesday, October 2025 ‘End of 10’ Edition
Microsoft today released software updates to plug a whopping 172 security holes in its Windows operating systems, including at least two vulnerabilities that are already being actively exploited. October's Patch Tuesday also marks the final month that Microsoft will ship security updates for...
The king is dead, long live the king! Windows 10 EOL and Windows 11 forensic artifacts
Introduction Windows 11 was released a few years ago, yet it has seen relatively weak enterprise adoption. According to statistics from our Global Emergency Response Team GERT investigations, as recently as early 2025, we found that Windows 7, which reached end of support in 2020, was encountered...
September 25, 2025—KB5066198 (OS Build 19045.6396) Preview
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August 26, 2025—KB5063842 (OS Build 19045.6282) Preview
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August 12, 2025—KB5063889 (OS Build 10240.21100)
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May 28, 2025—KB5058481 (OS Build 19045.5917) Preview
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May 27, 2025—KB5061978 (OS Build 17763.7322) Out-of-band
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April 16, 2025—KB5059091 (OS Build 17763.7249) Out-of-band
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March 25, 2025—KB5053643 (OS Build 19045.5679) Preview
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February 25, 2025—KB5052077 (OS Build 19045.5555) Preview
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February 15, 2022—KB5010415 (OS Builds 19042.1566, 19043.1566, and 19044.1566) Preview
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September 16, 2020—KB4577069 (OS Build 17763.1490) Preview
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January 23, 2020—KB4534308 (OS Build 17134.1276)
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January 23, 2020—KB4534318 (OS Build 16299.1654)
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June 26, 2019—KB4509476 (OS Build 15063.1898)
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May 28, 2019—KB4499162 (OS Build 15063.1839)
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January 15, 2019—KB4480959 (OS Build 15063.1596)
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