I dropped my mouse and it appears that the inside of the mouse moved and now the sensor (red light thingy) moved and thus the pointer won't move much, clicking stuff works however, How do you open the mouse?

Buy a new one and see if that cures the problem.

click start control panel mouse you should see 4 tabs buttons,pointers,pointer options and hardware under hardware you will have the options to troubleshoot also select properties under driver you will have options to update driver,rollback driver or uninstall and under hardware you can troubleshoot
you might have to uninstall the drivers restart your computer then reinstall the drivers
in xp
hope this helps

Hi,
Optical mouse was developed by Agilent Technologies and introduced to the world in late 1999, the optical mouse actually uses a tiny camera to take 1,500 pictures every second. Able to work on almost any surface, the mouse has a small, red light-emitting diode (LED) that bounces light off that surface onto a complimentary metal-oxide semiconductor (CMOS) sensor.
The CMOS sensor sends each image to a digital signal processor (DSP) for analysis. The DSP, operating at 18 MIPS (million instructions per second), is able to detect patterns in the images and see how those patterns have moved since the previous image. Based on the change in patterns over a sequence of images, the DSP determines how far the mouse has moved and sends the corresponding coordinates to the computer. The computer moves the cursor on the screen based on the coordinates received from the mouse. This happens hundreds of times each second, making the cursor appear to move very smoothly.
Optical mice have several benefits over wheeled mice:
No moving parts means less wear and a lower chance of failure.
There's no way for dirt to get inside the mouse and interfere with the tracking sensors.

Increased tracking resolution means smoother response.
They don't require a special surface, such as a mouse pad.

Although LED-based optical mice are fairly recent, another type of optical mouse has been around for over a decade. The original optical-mouse technology bounced a focused beam of light off a highly-reflective mouse pad onto a sensor. The mouse pad had a grid of dark lines. Each time the mouse was moved, the beam of light was interrupted by the grid. Whenever the light was interrupted, the sensor sent a signal to the computer and the cursor moved a corresponding amount. This kind of optical mouse was difficult to use, requiring that you hold it at precisely the right angle to ensure that the light beam and sensor aligned. Also, damage to or loss of the mouse pad rendered the mouse useless until a replacement pad was purchased. Today's LED-based optical mice are far more user-friendly and reliable.

Thanks and regards,
Anil.B.R

Check the battery

return that , it isn't your pc

If this is a cordless Optical mouse it uses a red optical beam to sense the surface below it. This is how it moves the pointer. If this is the same mouse/keyboard combo I have it does not have any other lights on the mouse itself.

It is quite annoying when its dark in the room since the bottom is somewhat transparent.

Hi,

1-Firstly you go to system control panel(Start button->setting->Control panel)
2-select the mouse option and click
3-you see the 5 option under it,select the pointer options
4-under the visibility option unmark Display pointer trails &
Hide pointer whilt typing option
and also check the pointer speed option under pointer option.
5-than ok..

Thanks,

Thanks! I fixed the problem by installing a USB mouse and using fn+f9. That unlocked the mouse so I could use the pointer leaving just the keyboard problem. I then tried reconnecting the wireless keyboard (by using the button on the receiver and under the keyboard) Hey Presto!!

Normal 0 Turn the mouse over and find the small rest/connect button on the bottom of the mouse and press it. This should connect the mouse to the receiver and work properly. If not, try pressing the receiver button and then press the button on the mouse. This should be done whenever you change batteries or glitch. Hope this helps you. Bud

In windows xp go into start menu, then into control panel then click on appearance and themes, then move your mouse over to mouse pointers click on it , uncheck "enhance pointer precision, and click apply, that will stop the mouse from acting crazy, this will work with dell mouse pointers and most.