My Logitech M100 is scrolling up and down randomly on its own. I still have control over the scroll wheel but I cannot stop my webpage from scrolling up and down. This STOPS only when I disconnect the USB cable. I have tried using other ports without any success. This also effects the volume meter and weapon changes in video games. Please help  Please avoid multiple post. If you have posted in a wrong thread, it will be moved by a mod. It also CONFUSES helpers like myself, now which one to reply lol.Sorry lol my mouse was plugged in at that mo and I didn't realise that it had scrolled down and I clicked software by mistake. I marked that thread as solved.  So is the problem solved or not?Sounds like it's time to replace the mouse.Or the batteries.In MANY countries Logitech m100 comes with 3 yrs warranty. Though mouse are cheap these days, you may want to check if its under warranty.It's wired, so no batteries. Plus it's out of warranty period. Never mind guess I gotta replace it.It might be worth contacting Logitech anyway, their SERVICE is excellent and they have been KNOWN to sometimes replace items even out of warranty.  If you don't ask, you don't get certainly worth 5 minutes filling out the form to see.