微軟社區的解決方案：
1. Left click on windows icon and choose settings.
2. Click on display tab.
3. Change the size of text to 125% Then apply.
4. DO NOT LOG OUT YET. Choose sign out later!
5. Change the text size back to 100% and click apply.
6. Now sign out and sign back in.
Your volume icon will be back. =)
簡單來操作就是 右鍵點擊桌面，選擇顯示設置，上調或下調當前字體顯示大小，選擇注銷(此時一般注銷後圖標會出現)。
或者稍後注銷，再次改變當前字體顯示大小，然後應用，注銷，音量圖標出現。
