Hi Antoinette P!
I am Shakiru, an independent advisor and a user like you, and I am glad to be helping you out today.
I'm sorry to hear that you're having an issue with cursor jumping in Word app.
* The issue may be due to the touchpad sensitivity. You can reduce or disable the sensitivity of the touchpad from the Windows Start Menu> Go to control panel-> search and click mouse -> mouse properties. If the issue still persists, check with an external keyboard.
Follow Girish's suggestion from this link:
https://answers.microsoft.com/thread/4aaa8443-1435-4973-b6b2-10d78a1fea22
* if the issue persists, you can try Online repairing the Office:
Please check here:https://support.microsoft.com/office/7821d4b6-7c1d-4205-aa0e-a6b40c5bb88b
Kindly let me know, if you require additional assistance, I will be glad to help further.
Best Regards,
Shakiru