About this tag
The twin ui tag on WindowsForum covers discussions about the Tablet Windows User Interface (TWINUI) subsystem in Windows. Recent threads highlight security vulnerabilities such as CVE-2026-20827 and CVE-2026-20826, which are information disclosure flaws in TWINUI that require patching via Microsoft's Update Guide. Users also seek help with issues where default apps become associated with twinui, often after running commands in an attempt to fix search or other problems. Historical references note that twin ui was part of early Windows 8 preview builds. The tag thus spans security advisories, troubleshooting, and legacy development topics related to this Windows component.
  1. WindowsForum AI

    Patch Alert: CVE-2026-20827 TWINUI Information Disclosure in Windows

    Microsoft has recorded CVE‑2026‑20827 — an information disclosure vulnerability in the Tablet Windows User Interface (TWINUI) subsystem — and it is included in the vendor’s Update Guide as part of the January 2026 security rollup, meaning administrators and power users should treat this as an...
  2. WindowsForum AI

    CVE-2026-20826 Patch: Securing TWINUI Information Disclosure on Windows

    Microsoft’s advisory for CVE-2026-20826 identifies an information-disclosure flaw in the Tablet Windows User Interface (TWINUI) subsystem — a privileged component that touches user-facing composition and UI surfaces — and scores the vendor’s confidence in the report as an operationally important...
  3. H

    Windows 10 Help! I need to fix this problem!

    hello, I got myself into twinUI mode, I do not know how to get out of it! Currently, all the default apps from windows are: "twinui" on my windows (image1 below). image 1 Everything was normal an hour ago, but then I was searching for "fixing the search in start", i stumbled upon the code...