Being new to this Lounge, my wording may differ from Lounge standards, but bear with me please. I recently faced the following problem:
The ctrl+end shortcut suddenly stopped functioning. I posted a question through http://answers.microsoft.com/ and received the following answer:
Click the Office button.
Click Word Options.
Click Customize.
Click Customize … at the bottom of the dialogue next to Keyboard shortcuts.
Click in the Press new shortcut key box.
Press Ctrl+End
If you do not see Ctrl+End appear in the box, you probably have a mechanical problem with your keyboard.
If Ctrl+End does appear in the box, it should currenctly be assigned to EndOfDocument. If it is assigned to something else, select that and click Remove.
To assign Ctrl+End to EndOfDocument again:
Select All Commands in the list of Categories on the left.
Select EndOfDocument in the list of commands on the right.
Click Assign.
Then close the dialogues.
I hope Lounge users will find this useful.