Summary
The left arrow key may not be working due to a few reasons. It could be due to a hardware issue, such as dirt or debris blocking the key.
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It could also be due to a software issue, such as the F-Lock key being toggled.
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Additionally, it could be due to a driver issue, as one user found out after uninstalling all the drivers related to their keyboard, doing a clean boot, checking the Corsair software, and disabling Microsoft services.
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According to
When working on your computer, you arrow keys may stop functioning, as in they no longer ... n space arrow keys not working ✓ - Forum - Keyboard Help! left ...
Arrows on Keyboard Not Working - CCM
ccm.net
Summary
A user on Tom's Hardware Forum is having trouble with their left arrow key not working. They have tried uninstalling all the drivers related to their keyboard, doing a clean boot, checking the Corsair software, and disabling Microsoft services. After doing these steps, the left arrow key worked for a while, but the user was unable to find the cause.
Keyboard "Left Arrow" Key isn't working. | Tom's Hardware Forum
tomshardware.com
The keyboard is the single, most useful peripheral device in a computer. Before the ... you do not expect the up and down key to work together; or the left ...
Fix: Arrow Keys not Working - Appuals.com
appuals.com
