Green lines across display

Update the drivers of your cursor (from touchpad maker's website, or Laptop manufacturer's). Drivers and Manuals

Well the touchpad driver could be erased or a virus may have damaged it.
You should go to Acers website and then support and download drivers and get the right touchpad driver.
Install it and see if it works.
Use TAB to navigate for now. or use mouse keys.
This means keep pressing shift really fast and accessibility option will show up.
Use tab and space bar to navigate to MOUSE TAB and select Mouse Keys and hit enter.
Done for now you can use the numpad to operate the cursor.
Second option is to go out and buy a USB mouse.

Worst case scenario: Touchpad is damaged and needs replacing.
Or simply a cable got disconnected and needs reconnecting by taking the laptop apart
Get Your Laptop Mouse to Show Up if It Disappears
Using a laptop is as efficient as a desktop computer to complete tasks, use the Internet and talk with friends on a daily basis.
If your laptop's mouse cursor disappears, there are various tricks and solutions available to help get your mouse pointer back to resume your work and current computer tasks within minutes.
And this can be accomplished without the use of software applications or advanced computer skills.
Press "Ctrl" + "Alt" + "Delete" and choose "Task Manager" if your mouse pointer becomes available, pressing the keys simultaneously.
This will allow you to close any open programs that may be causing issues with your mouse pointer.
Plug in an external mouse to allow the computer to attempt to find the device, prompting the mouse pointer to appear which may solve the problem or allow you to temporarily work with a mouse pointer.

Reboot your computer by pressing and holding the laptop's power button for a few seconds.
This will reset your laptop's current open settings and most often allow your computer's mouse pointer to reappear.

Upgrade your laptop's video and graphic card drivers (if available) to ensure the mouse pointer disappearing or flickering is not a hardware issue.
Select "Start" > "Control Panel" > "Hardware and Sound" > "Device Manager" to view your current graphic and video settings.
Visit your device manufacturer's official website to download the most current version of your drivers.



http://support.microsoft.com/kb/198614

Power supply is probably going out. Not likely the video card in this case.

you're mouse is already giving way. If not, your trackpad is.

To move the pointer, slide your finger across the TouchPad surface in the direction you want the pointer to go. Use the TouchPad buttons like the corresponding buttons on an external mouse. To scroll up and down using the TouchPad vertical scroll zone (right edge of the touchpad), slide your finger up or down over the lines.

NOTE: If you are using the TouchPad to move the pointer, you must lift your finger off the TouchPad
before moving it to the scroll zone.

OSD means On Screen Display. To unlock the OSD hold the power button of the monitor until you get a message similar to "OSD unlocked".
If you still have problems, click on this link for further instructions :-
http://www.ehow.com/how_5008634_fix-lockout-display-computer-monitor.html

There is a setting in Mouse Properties that lets you modify this setting. Right-click an empty spot on your desktop, Personalize, Mouse Pointers, Pointer Options, unclick "Hide pointer while typing"

I assume it requires batteries-have you replaced these?

Run a dianostic on your memory or add more to the system

try a diff mouse. try a diff usb port