As soon as I plug in the USB to the printer the cursor starts dancing around by itself...including clicking on random stuff. Pull out the USB and it is back to normal again. The computer (Samsung new series 9 laptop) is pretty much useless when the printer is plugged in. Have tried updating the driver from Canon's site but that did not help.
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Re: Canon MX726 upsets the cursor/touchpad
Have you tried deleting the driver or printer from your computer. with computer turned off plug printer in to computer then turn on computer see if it picks up the driver automatically and fixes the problem. Do not use a driver disk unless this does not work. If it doesn't put the driver disk into computer before shutting down and repeat above this time with disk in the computer already.
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Depending on the sensitivity and settings of the touchpad, it may register undesired motions as mouse controls, causing the cursor to jump erratically. The software drivers that includes with its systems have sensitivity options that help alleviate this problem and ensure that only deliberate touchpad motions and taps cause the cursor to move.
Click on the Start menu and open the Control Panel. Choose an "Icon View" option from the "View by" dropdown menu, then click the "Mouse" icon. Navigate to the "Device Settings" tab and click on the Synaptics device in the list. If you have installed and use custom software other than a Synaptics application for controlling the touchpad, select it instead. Click the "Settings" button. Click the "+" symbol to expand the "Pointing" section in the left frame, and then the "Sensitivity" section. Click on "PalmCheck." If you have replaced the Synaptics drivers, the menu may use a different set of options. Click and drag the bar to the right, closer to the "Maximum" setting. An increased PalmCheck setting will help decrease cursor jumping due to accidental palm activations, a common occurrence when typing. Click on "Touch Sensitivity." Click and drag the bar to the right, closer to the "Heavy Touch" end. This will ensure light brushes by fingers or accidental activations by other objects will not cause the cursor to jump. Click "Apply" to test the settings, and "OK" when satisfied to save the changes and close the window.
You are probably hitting the touchpad on your laptop with the heel of your hand while you're typing. This will make the cursor move to some other place. It's not really moving by itself; you just aren't aware you're doing it. I would suggest turning off the touchpad while you're typing, and then turn it back on as needed. Compaq computers usually have a switch on the touchpad bezel to turn it off. Some people also plug in a USB mouse, finding it more convenient and comfortable if they want to move around on the document frequently.
If your cursor moves erratically on the screen (for example, if it jumps around the screen, moves at varying speeds, or selects items on its own), perform the following steps:
1. Clean the surface of the touchpad with a dry, soft cloth to remove grease, sweat, moisture, or other liquids.
2. Adjust the sensitivity of the touch pad:.
a. Click the Start button and click Control Panel.
b. Click Printers and Other Hardware.
c. Click Mouse.
d. When the Mouse Properties window appears, click the Pointer Options tab.
e. Under Select a pointer speed:, click to move the slider bar closer to Slow.
f. Click OK.
g. Check to see if the touch pad still behaves erratically.
3. If the touchpad still caused the cursor to behave erratically, attach an external mouse to your computer and restart your computer. Use the external mouse to see if your cursor still moves erratically.
4. After connecting an external mouse, uninstall the touchpad driver from the Device manager listed under the "mice and other pointing devices" category and restart the Computer.
5. Download the Touchpad driver compatible to the Operating System installed on the Computer from the manufacturer's site and install it after restarting the Computer.
Plug in a USB mouse, and go to Contol Panel>system>device manager and click on the +sign next to pointing devices. Right click touchpad and uninstall the touchpad, then reboot the computer, remove the usb mouse. Windows will pick up the touchpad as new hardware and re-install the drivers for it etc..
Hi - I've been having the same problem and it is MAJORLY annoying to be typing along, and have the cursor reappear on another line!
I had a heck of a time finding the place to disable the touchpad, since we use a USB mouse with the laptop. Turns out, someone else helped me find a simple way - hold down the Fn key (next to the left side CNTRL key), and hit F7. That toggles the touchpad off/on easily!
Also suggested by someone else, some mice can cause erratice behavior with Acer laptops, so perhaps try another mouse?
So far, I've been typing this response AFTER disabling the touchpad, and the cursor has not jumped around at all.