I'm running Windows 8 on an Acer Aspire V5-571P-6407 that I bought about a month ago.
When typing in Word, or Outlook (both are 2013 versions) or even in this screen, the cursor will disappear (as in go to another field on the screen, like it just jumped up to the url field in Firefox) or go to another window, or jump around on the data entry screen to the middle or an earlier sentence or select a section of text to highlight. My hands, arms and shirt sleeves are nowhere near the touchpad, so I'm anticipating that there may be an updated driver for this touchpad that I haven't been able to find or there's a Windows 8 fix or the keyboard/touchpad needs to be replaced.