Did you use system restore to yesterday?
On booting up today, there was no mouse cursor in the centre of the screen.
I discovered that if I operate the mouse quickly, the cursor would appear from the top right corner of the screen but as soon as I stop the mouse, the cursor moves quickly back to the top right corner and disappears. I do not have the time to click on anything.
Is there anything simple that I can do without calling in a computer technician?

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