Though the mouse is not the most robust part in a computer, if it has some malfunction, it would seriously affect your computer working well. Usually if a mouse is working irregularly, it would have problems like that the pointer is movable on the screen but later it freezes up, or sometimes the pointer may jump on the screen erratically, etc. If such failure happens, how can you repair it?
First of all, you need to clean the mouse pad. Because the pad may have a lot of dirt or grease as you drag and drop your mouse on it heaps of times.
Then if the first check can not work, go to the second step. But before you do this, you have to know what kind of mouse you are using.
If it is a ball mouse, you need to take the ball apart from your mouse and clear up all the obstruction like dust and dirt built-up on the ball and inside the mouse. With certain computer knowledge you even can disassemble the whole mouse and completely clean it.
If it is an optical mouse, you have to check its bottom to see whether there is something like a piece of tape there. Besides, test this mouse on another surface like a sheet of paper to see if it can work regularly.
If the mouse still fails to work, try to reinstall its driver, or download some driver tools like Driver Checker to help you find out the most suitable mouse driver.
Additionally, the opening or closing of a process or the high CPU usage also can make a bad impact on your mouse working. However, the failure also could be a broken mouse, or that it has been used too many times and should be obsoleted.