Thanks for taking the trouble to reply. I have no problem with the mouse - its only in excel that there is an occasional problem.

Here are some of the previously posted enquiries about this.

5 Jan 2023 — The cursor highlights a different cell that the one it rests on. Similar workaround - switch to another sheet and come back. Is there a fix?

AI reply.
If Excel is not selecting the correct cell, the issue might be related to the "Extend Selection" mode, zoom settings, or other factors like a corrupted workbook or add-ins. You can try pressing F8 to disable "Extend Selection" mode, adjusting the zoom level, or restarting Excel to resolve the problem.

I have found that switching to another worksheet and back fixes the problem until it happens again.

As far as I am aware, there is no fix for this yet. It is one of those annoying intermittent problems that never seems to get fixed - probably no one has the time to investigate properly and it is very difficult to reproduce.