Hi Lola1980!
Welcome to Microsoft Office Community Forum. Thank you for sharing your concern with us today and we hope that all is well.
We understand that you are trying to edit your Microsoft Word documents and is unable to because your cursor seems to jump to the end of the document and saving prompts appear out of nowhere. Let’s us check on this together and sort this out. Rest assured, we will do anything in our capability to assist you with your concern.
To our understanding, you have been experiencing this issue for a year already and we cannot imagine how you managed to edit and use Office Word. This problem normally occurs due to an issue with keyboard or mouse and might be the application also needs repair in which we need to further isolate your case.
We’d like to know more about it in details so that we can provide a more accurate resolution for you. To start, please provide us information/answer on the following questions:
- We would like to confirm your device build. In Windows settings, please select System. Please look for About and provide to us your Windows specifications. See attached screenshot for guide:

- What Office license are you using? To check that, open Word, click onFile tab > Office Account.

- Are you experiencing same issue on other applications (such as Excel, browsers and paint)?
- Did you recently or a year ago changed your mouse or keyboard?
- We would like to ask for a screen recording, kindly send us here on reply. See here for guide: Record your screen in PowerPoint
We look forward to your response. If you have other clarifications about this matter, you can get back to us by replying to this post.
Sincerely,
Kathy Agn
Consumer M365 Forum Moderator
Microsoft Community