If you notice that both Ctrl keys are pressed (highlighted in blue), it is clear that it is a blocked key. Type’osk’ in the text box and press Enter to open the

Here is a brief guide to testing a Ctrl key locked with the on-screen keyboard: Several users confirmed that launching the on-screen keyboard allowed them to confirm that the Ctrl key was pressed and is at the origin of this behaviour. If you see no difference with the other keys, you must use the on-screen keyboard (OSK) to make sure that the Ctrl key is pressed or not. You can start by checking that the CTRL key is physically pressed. This happens in any application, including native Windows programs such as File Explorer or WordPad. If you didn’t know when you pressed one of the CTRL keys and scrolled up or down, scrolling the mouse creates a zoom. It turns out that one of the most common causes that this type of behaviour will trigger is a blocked CTRL key. Check the methods below to guide you on how to fix this problem. If you are struggling with issue on your mouse zooming instead of scrolling, then you are in the right place. Update: Stop getting error messages and slow down your system with our optimization tool.