呼叫標點符號表功能快捷鍵不見了

朋友家中電腦 (Windows XP 中文繁體版) 的 Ctrl + Left Alt + Comma 呼叫標點符號表功能快捷鍵不見了，也不能重設。

找了很久，終於"google" 到一點頭緒。
--> http://forums.microsoft.com/TechNet-CHT/ShowPost.aspx?PostID=1148797&SiteID=23

原來Windows 的 Registry 中有一堆 Key 是關於鍵盤語文輸入熱鍵 (Hotkeys for input languages) 的，它們的原始模樣是︰

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys]

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000010]
"Key Modifiers"=hex:02,c0,00,00
"Target IME"=hex:00,00,00,00
"Virtual Key"=hex:20,00,00,00

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000011]
"Key Modifiers"=hex:04,c0,00,00
"Target IME"=hex:00,00,00,00
"Virtual Key"=hex:20,00,00,00

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000012]
"Key Modifiers"=hex:02,c0,00,00
"Target IME"=hex:00,00,00,00
"Virtual Key"=hex:be,00,00,00

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000070]
"Key Modifiers"=hex:02,c0,00,00
"Target IME"=hex:00,00,00,00
"Virtual Key"=hex:20,00,00,00

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000071]
"Key Modifiers"=hex:04,c0,00,00
"Target IME"=hex:00,00,00,00
"Virtual Key"=hex:20,00,00,00

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000072]
"Key Modifiers"=hex:03,c0,00,00
"Target IME"=hex:00,00,00,00
"Virtual Key"=hex:bc,00,00,00

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000200]
"Key Modifiers"=hex:03,c0,00,00
"Target IME"=hex:00,00,00,00
"Virtual Key"=hex:47,00,00,00

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000201]
"Key Modifiers"=hex:03,c0,00,00
"Target IME"=hex:00,00,00,00
"Virtual Key"=hex:4b,00,00,00

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000202]
"Key Modifiers"=hex:03,c0,00,00
"Target IME"=hex:00,00,00,00
"Virtual Key"=hex:4c,00,00,00

[HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000203]
"Virtual Key"=hex:56,00,00,00
"Key Modifiers"=hex:03,c0,00,00
"Target IME"=hex:00,00,00,00

朋友的電腦就是少了 [HKEY_CURRENT_USER\Control Panel\Input Method\Hot Keys\00000072]這部分，於是加回去就回復原狀了！