Hello everyone! ♥ I'm facing an incredibly frustrating problem with my laptop. First of all I would like to say that the laptop has been exchanged once for an identical one, and the same problem occurs on the new one. Also a full system recovery does not fix the problem. The problem is either the mouse buttons or the touchpad; but not all the time, it only happens when I'm clicking and dragging something, ie: scrolling down Google Chrome, changing the size of a window or changing the border size on Microsoft Word. I really don't know how to describe this, but I'll do my best while trying not to ramble. Usually when you click and drag something, the process goes: 'click the mouse button, drag the cursor, release the mouse button, done' Well, mine goes: 'click the mouse button, drag the cursor, release the mouse button, the laptop doesn't register that I've released the mouse button, and whatever I was dragging goes mental on the screen wherever I move my cursor to; and won't let me do anything else.' When it does this, it's a case of waiting for it to stop. I can't click anything, pressing escape does nothing, only the right click works, not the left. Usually within a minute it's stopped, but sometimes a few seconds later it does it again. It occurs randomly, and only when I'm clicking and dragging something/anything. I'm getting so tired of this, it's very stressful, can anyone help me please? Laptop: Acer Aspire E1-572 System: Windows 8.1 Device manager: HID-compliant mouse (updated to latest) Synaptics PS/2 Port TouchPad (updated to latest) Screenshots of current mouse settings (if it helps!): 1 - http://puu.sh/cNENq/656e37e257.png 2 - http://puu.sh/cNEWC/acf76ea4dc.png 2 - http://puu.sh/cNF1V/4053c9e9f8.jpg Thanks in advance ♥ If you're viewing this thread and have the same problem, here is my solution progress. Hope it helps: Updated drivers (including BIOS) to latest versions http://puu.sh/cS2nB/15d31a954e.jpg - didn't work. Changed some scrolling settings http://puu.sh/cPr3B/27314fc8a0.png - didn't work Did this: http://winaero.com/blog/fix-touchpad-left-click-will-intermittently-not-work-in-windows-8-1/ - didn't work. Intel updates: http://www.intel.com/p/en_US/support/detect - didn't work. Turned down the setting for Smart Sense - http://puu.sh/cTK45/dfd47f663d.png - didn't work. Completely uninstalled all Synaptics software and redownloaded an older version from Acer's website - WORKED! Issue resolved - thanks everyone who commented, special thanks to Kemical for your persistent help and support here.