I am using Win7 64 bit. Randomly a mouse pointer appears that has a hand super imposed over a box that has a up down arrow on the right side. It automatically scrolls where ever I place the pointer over an object on the desktop. I cannot make it disappear. Rebooting the PC will return the mouse pointer to the normal arrow but the "strange mouse" will reappear at a random time. I have changed the mouse from a wireless device to a hard wired USB mouse. The change makes no difference, the "strange mouse" appears no matter what mouse device I use. This has me totally stumped. Help!!!