My mouse is sometimes suddently moving away and not responding to my mouvment

Don't throw the batteries away without testing them.. If they are good reinsert them and check if the problem is resolved. I no longer bother with the battery check, poor mouse response happens when the battery is low. I just pop out one battery and reinsert it. It never takes more than twice to make it behave :)

Try to plug it in a different USB port. If the problem persist, try it on another computer or laptop. If it still makes the same problem, you will know it's because of the mouse.

Replace the mouse with a new optical mouse.

Do you mean you might used it on you lap rather than the desk and have changed the angle of the mouse? It will be the lazer, (if changing the angle of the mouse works). Disruptions occur with the lazer, hey they don't wear like a ball mouse does. You can have it repaired, just have to decide if it is cheaper or easier to just replace it. (Tip, don't leave it in direct sunlight when you are away from the computer. It shortens the life of a lazer mouse).

In my mind it's just a couple things. The mouse or the port. Hopefully you haven't removed(or plugged in) the mouse plug when the laptop was turned on. [Only a USB can be plugged/unplugged when the computer is on.]
Try getting a new mouse. If that doesn't work you may have to have it taken in and have it looked at. Good luck.

check teh batter connection on phone tery to put a a small peice of paper in th bootom of battery so it wont move while walking or doing any mouvment

only for pecture

Even though it does not make sense, if you are using a wireless keyboard that is part of a combo pack (mouse included) sometimes (some brands) you have to plug in all cords on the keyboard/mouse receiver.

if wireless or usb

check mouse and pen device settings on pc

if no better
new mouse and pen

have you checked that it is the USB port if it is not in the USB port it will not respond