問題描述 (Description)
[English] After installing update KB5079473, the User Account Control (UAC) prompt fails to function on Windows 11 Version 25H2. When a standard user attempts to perform actions requiring administrative privileges (e.g., "Run as administrator" or accessing "Disk Management"), the UAC window flashes briefly and immediately crashes/closes. Instead of showing the credential prompt, the system immediately returns an "Access Denied" or "Insufficient Privileges" error. This effectively blocks all administrative authentication and system maintenance tasks for standard users.
[中文] 在安裝更新 KB5079473 後,Windows 11 25H2 版本的「使用者帳戶控制 (UAC)」功能失效。當一般使用者嘗試執行需要管理員權限的操作(例如:「以管理員身分執行」或開啟「磁碟管理」)時,疑似 UAC 視窗快速閃退並立即關閉。
系統不會顯示輸入密碼的視窗,而是直接跳出「權限不足」或「沒有管理員存取權限」的提示。這導致系統無法進行管理員身分驗證,實際上封鎖了所有一般使用者的軟體管理與系統維護任務。
系統關鍵資訊 (Key Specs)
OS Build (作業系統組建): 26200.8037 (Version 25H2) / 26100.8037
Update ID (更新編號): KB5079473
Symptom (徵兆): UAC dialog "flashing" and crashing immediately; followed by "Access Denied" errors (UAC 視窗快速閃退,隨後直接顯示權限不足錯誤)。
Impact (影響範圍): Critical. Standard users cannot elevate privileges (嚴重。一般使用者完全無法提升權限)。
重現步驟 (Steps to Reproduce)
[Step 1] Log in as a standard user account. (以一般使用者帳戶登入系統。)
[Step 2] Right-click an application and select "Run as administrator", or attempt to open "Disk Management" from Computer Management. (右鍵點擊程式選擇「以管理員身分執行」,或從電腦管理嘗試開啟「磁碟管理」。)
[Step 3] Observe the screen: the UAC prompt flashes for a split second on the Secure Desktop and then disappears. (觀察螢幕:UAC 提示在安全桌面上閃爍不到一秒後隨即消失。)
- [Step 4] An error message appears immediately stating "You do not have administrative access" or "Access Denied". (隨後立即顯示「你沒有管理員的存取權限」或「存取被拒」的錯誤訊息。)
問題描述 (Description)
[English] After installing update KB5079473, the User Account Control (UAC) prompt fails to function on Windows 11 Version 25H2. When a standard user attempts to perform actions requiring administrative privileges (e.g., "Run as administrator" or accessing "Disk Management"), the UAC window flashes briefly and immediately crashes/closes. Instead of showing the credential prompt, the system immediately returns an "Access Denied" or "Insufficient Privileges" error. This effectively blocks all administrative authentication and system maintenance tasks for standard users. [中文] 在安裝更新 KB5079473 後,Windows 11 25H2 版本的「使用者帳戶控制 (UAC)」功能失效。當一般使用者嘗試執行需要管理員權限的操作(例如:「以管理員身分執行」或開啟「磁碟管理」)時,疑似 UAC 視窗快速閃退並立即關閉。 系統不會顯示輸入密碼的視窗,而是直接跳出「權限不足」或「沒有管理員存取權限」的提示。這導致系統無法進行管理員身分驗證,實際上封鎖了所有一般使用者的軟體管理與系統維護任務。系統關鍵資訊 (Key Specs)
- OS Build (作業系統組建): 26200.8037 (Version 25H2) / 26100.8037
- Update ID (更新編號): KB5079473
- Symptom (徵兆): UAC dialog "flashing" and crashing immediately; followed by "Access Denied" errors (UAC 視窗快速閃退,隨後直接顯示權限不足錯誤)。
- Impact (影響範圍): Critical. Standard users cannot elevate privileges (嚴重。一般使用者完全無法提升權限)。
重現步驟 (Steps to Reproduce)
- [Step 1] Log in as a standard user account. (以一般使用者帳戶登入系統。)
- [Step 2] Right-click an application and select "Run as administrator", or attempt to open "Disk Management" from Computer Management. (右鍵點擊程式選擇「以管理員身分執行」,或從電腦管理嘗試開啟「磁碟管理」。)
- [Step 3] Observe the screen: the UAC prompt flashes for a split second on the Secure Desktop and then disappears. (觀察螢幕:UAC 提示在安全桌面上閃爍不到一秒後隨即消失。)
- [Step 4] An error message appears immediately stating "You do not have administrative access" or "Access Denied". (隨後立即顯示「你沒有管理員的存取權限」或「存取被拒」的錯誤訊息。)
WINDOWS 更新發布訊息
2026 年 3 月 10 日 — KB5079473 (作業系統組建 26200.8037 與 26100.8037)