Pin to Taskbar

In Windows 7, there may be occasional error where user cannot drag and drop an application program to Windows Taskbar (Superbar) and Start Menu anymore, with the icon shows a red cross when user attempts to place it on Taskbar or Start Menu. When right click on a program icon or shortcut, the “Pin to Taskbar” and “Pin to Start Menu” context menu is missing and not showing too.
The cause of the problem is because users have made the shortcut in Windows 7 to be ‘not a shortcut’ by removing the shortcut arrow on icons, including desktop icons, by removing IsShortcut registry key.
Thus, to fix the issue that application programs unable to pin to Taskbar and Start Menu, just re-add the IsShortcut registry key back to .lnk (and other extensions if applicable) shortcut to reset and restore back original registry values.
The error happens because of missing registry value data for lnkfile registry key, which defines the behavior of all shortcut or .lnk files on the system. The registry value data in question, IsShortcut, can be accidentally deleted when user tries to hide and remove the arrow overlay icon on shortcuts. 

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To resolve the missing or lost “Open file location” entry, the IsShortcut registry value and the file associations for shortcuts has to be fixed.

1. Run Registry Editor (regedit.exe).
2. Navigate to the following registry key:

   HKEY_CLASSES_ROOT/lnkfile

3. Right click on the right pane, and select New -> String Value (REG_SZ) to create a new registry value.
4. Name the new registry value as IsShortcut . No value data required.
5. Restart the computer.

If you already delete and other registry keys to remove shortcut arrows you must to do the same for all of them...

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