In Toshiba, Acer and Lenovo laptops, the Synaptics pointing device drivers version 19.0.9.5 and software utility and the Lenovo mouse drivers have been known to cause this problem. This problem is mostly (but not exclusively) caused by a conflict between your mouse and keyboard drivers.
Software issues can be caused by malware or bugs in input devices utilities or driver conflict. Hardware problems could be caused by mechanical or electrical damage to the spacebar key, or because of the use of outdated or bad drivers. This will tell you if it is a software problem or a hardware problem. The first thing you should do is try another keyboard. In this article we will explain why this problem occurs and give remedies to it. The users that we received this error from were mostly Toshiba, and Lenovo laptop users but Dell, Acer and Hp users also made appearances. Others state that this symptoms are spread to the 1 2 3 & 4 keys. While for some users, the spacebar does not work completely, for others the spacebar will only work when the Fn key is held down. This is why I have been receiving hilarious messages like, “Kevin.My.Spacebar.Is.Not.Working” or “My_Spacebar_is_not_working” and even “Myspacebarisnotworking” among other variations that indicate the users are really suffering with this problem. The spacebar is also used as a gaming key to handle the most common actions. Whenever a user is asked to press any key in order to continue a process, they instinctively press the spacebar or the enter key, unless they are those kind of people that slap their keyboard and let fate decide. It is estimated the spacebar is pressed 5 times every 10 seconds when typing. There is nothing much you will do without it in fact nothing at all. Did you manage to troubleshoot the problem? Let us know in the comments below.Imagine a keyboard without a spacebar. If the issue persists, use a different keyboard and check the results. Then, check your keyboard settings, and run the Keyboard troubleshooter. If your keyboard is double spacing, restart your computer and clean your keyboard. For step-by-step instructions, see Microsoft Word: Remove Extra Spaces Between Words. If you want to quickly fix the double spacing problem in Microsoft Word, you can use the built-in Find and Replace tool.
How to Fix Double Spacing Between Words in Word