Full Report
Microsoft has released the optional KB5058481 preview cumulative update for Windows 10 22H2 with seven changes, including restoring seconds to the time display in the calendar flyout for those who previously lost it. [...]
Analysis Summary
# Patch Update Summary: KB5058481 for Windows 10 22H2
## Main Topic
Microsoft released the optional preview cumulative update KB5058481 for Windows 10 version 22H2, primarily addressing system usability improvements and technical rendering fixes. The most notable user-facing change is the restoration of seconds to the time display in the calendar flyout accessed via the taskbar clock.
## Key Points
- **Calendar Flyout Enhancement:** The update restores the clock view within the calendar flyout to display seconds, functionality previously removed.
- **Rich Calendar Feature:** The upcoming events period shown in the Rich Calendar feature has been extended to 30 days, and description text has been added for the Weather button.
- **GDI/GDI+ Fixes:** Addressed rendering issues for specific GB18030-2022 characters (both in plane 2 and general rendering width issues where sample paragraphs were incorrect).
- **Mobile Operator Profiles:** Updated Country and Operator Settings Asset (COSA) profiles.
- **WinSaS Fix:** Resolved an issue in European Economic Area markets where secondary accounts were not recognized by the Windows Account Sync Consent system, which was causing increased server load.
- **Known Issue:** Blurry or unclear CJK text when displayed at 96 DPI (100% scaling) in Chromium-based browsers (Edge, Chrome).
- **Workaround:** Set display scaling to 125% or 150% to mitigate the blurry text issue.
## Threat Actors
- No threat actors, campaigns, or motivations are mentioned in direct connection with this software patch update.
## TTPs
- No Tactics, Techniques, and Procedures (TTPs) related to threat activity are mentioned.
## Affected Systems
- **Operating System:** Windows 10, version 22H2.
- **Specific Software Components Impacted:** Calendar/Taskbar clock interface, GDI/GDI+, Mobile Operator Profiles, and Windows Account Sync Consent (WinSaS) in EEA markets.
## Mitigations
- **Install Update:** Apply the optional preview update KB5058481.
- **Display Scaling Workaround:** For users experiencing blurry CJK text at 96 DPI in Chromium browsers, set display scaling to 125% or 150%.
## Conclusion
This update is primarily a feature and stability release focused on user interface elements (calendar flyout) and specific rendering/regional fixes. While the included article mentions separate, unrelated threat intelligence topics (e.g., APT41, PumaBot), this specific summary is strictly limited to the details surrounding the KB5058481 patch, which contains no actionable threat intelligence related to malicious activity. Users should install the update for feature restoration and apply the scaling workaround if they observe the documented text display issue.