CTRL + Arrow not working properly

[nhbcai]

Unexpectedly my CTRL + Arrow stopped working as it is supposed to. Specifically, in any document (including a blank document) CTRL + Arrow Up of Down behaves normally, however CRTL + right only scrolls to the right edge of the screen and CTRL + Left does nothing. If I scroll so far right that row A is off the screen to the left, then CTRL + Left takes me back one screen width to the left.

Please let me know if you have any suggestions or questions. Thanks in advance for your help.

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[Hermanito]

you have accidentally activated your Scroll Lock.
Press the Scroll Lock key and things should be normal again...