OS SecurityBleeping Computer
4.0 — MEDIUM
Microsoft says KB5120998 Windows update resets desktop settings
Microsoft has confirmed that desktop settings are lost or reset on some Windows devices after installing the KB5120998 August 2026 preview update. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
A Windows update (KB5120998) has caused desktop settings to be lost or reset on some systems, potentially allowing attackers to exploit this issue for lateral movement once valid credentials are obtained.
⚙️Technical Details
Affected Systems
Windows 11 24H2Windows 11 25H2
Attack Vectors
Automatic installation of KB5120998 update
💥Impact Assessment
Severity: Medium
Who Is at Risk
Users of Windows 11 24H2 and Windows 11 25H2
🛡️Recommended Actions
1Disable automatic updates for the KB5120998 update until a patch is released.
2Manually check and restore custom desktop settings after installing the update.
3Monitor system logs for any suspicious activity related to the update.
📦Affected Products
Windows 11 24H2Windows 11 25H2
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