Windows 11 KB5120998 Update Resets Mouse Cursor Settings, Preventing Restoration
What Happened — Microsoft’s August 2026 non‑security preview update KB5120998 for Windows 11 (versions 24H2/25H2) has been reported to automatically revert custom mouse cursor settings to default values. Users cannot restore their prior personalization after the update installs.
Why It Matters for Trust & Control Assurance
- Uncontrolled configuration drift after a routine OS update illustrates the need for continuous configuration‑baseline monitoring.
- Documenting the update‑induced change and evidencing remediation supports a defensible audit trail for change‑management controls.
- The scenario maps directly to the control objective of configuration management and change control, a single VCF objective that satisfies many frameworks (e.g., NIST CSF, ISO 27001).
Who Is Affected – Enterprises and end‑users across all sectors that run Windows 11 on desktops or laptops.
Recommended Actions
- Deploy the update first in a test environment to verify that existing configuration baselines remain intact.
- Capture pre‑ and post‑update configuration snapshots (e.g., mouse cursor registry keys) as evidence of control compliance.
- If regression occurs, use Group Policy or endpoint‑management tools to re‑apply the desired settings and document the remediation steps.
- Log the incident in your change‑management system and track remediation as a control‑effectiveness metric.
Source: BleepingComputer
Technical Notes – The issue is limited to UI personalization (cursor size, animation, high‑DPI assets). No security‑related CVE is associated; the update is optional and non‑security‑focused. Microsoft is investigating the root cause and has asked affected users to submit feedback via the Feedback Hub.