Windows 10 still powers one in six PCs around today — and that could be a major security issue very soon
- Migration is slowing down as the more difficult cases remain on the legacy OS
- Windows 10 devices are said to have 3x as many active CVEs
- Technical limitations and physical upgrades aren't a major issue
According to new Lansweeper data, as many as 16.9% of Windows client devices, which equates roughly to a total of one in six overall, still runs Windows 10.
While Windows 11 now accounts for 78.8% of installs and Windows 10's market share has fallen from about 50% in mid-2025, Lansweeper warns the migration is starting to slow down, implying the remaining Windows 10 market share could show no signs of going anywhere.
And that's a worrying state of affairs, because the average Windows 10 device has around 3x as many active CVEs (1,903) as a Windows 11 devices (652).
Additionally, around two-thirds of the active CVEs on Windows 10 are rated high or critical,...
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