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The original was posted on /r/lifeprotips by /u/Killentyme55 on 2025-06-29 01:01:01+00:00.
I have an Acer laptop that is almost always plugged in. A while back the cursor randomly started jumping all over the screen rather than following the touchpad inputs. Sometimes it was fine, other times all over the place. I tried all the Google recommendations, uninstall/reinstall the driver, check for firmware updates, etc. but no luck. I finally replaced the touchpad which worked at first, but not for long.
Long story short, it was due to a cheap aftermarket charger. I was skeptical when I first read about the possibility until I discovered that the problem didn't exist when on battery alone (hence the random behavior). I tried a different charger and problem solved.
Don't ask me why, but it's been months with no issues. I never argue with success.