Optical mouse quit working on my notebook (by 4 users)

How to synchronize Logitech® Cordless Mouse to Receiver?

The term 'synchronize' refers to connecting a non-Bluetooth wireless device with its receiver. In the case of the Logitech® Cordless Mouse it uses a 2.4GHz Micro-Receiver that does NOT have a connect button for synchronizing/connecting the mouse. This is because the mouse and receiver are pre-synchronized at the factory. If the mouse and receiver ever lose connection for some reason, there is a utility, called the Connection Utility that will re-establish the synchronization between the device and its receiver. SetPoint 2.40 or higher is required in order to use this utility. You can download SetPoint and the Connection Utility from www.logitech.com. It is suggested that you save the file(s) to the Windows desktop or somewhere you can find them easily. If you have already installed Setpoint 2.4x, the Connection Utility will be located on your hard drive at the following location:

C:\Program Files\Logitech\SetPoint\logitechconnect.exe or click on Start/Program/Logitech/connect utility

In order to use the Connection Utility, please double click the Connection Utility icon and then follow these instructions. Please note that a message stating "To connect your device, press the connect/reset button on the bottom of the device" may appear during this process. Disregard this message and do the following:

Connect receiver to the USB port on your PC
Put a charged battery in the Logitech® Cordless Mouse

Run the Connection Utility (logitechconnect.exe)
Click the mouse left button and keep it pressed until told to release it in the following steps
Press the reset/power button under the mouse briefly (do not hold the button as it will turn the mouse off.)
Click the right mouse button 5 times
Release the left mouse button
The Logitech® should be resynchronized with the receiver within a few seconds.

Your not alone, Have the same problem and after searching the web for an answer ive noticed two things: 1) there are a ton of people with this problem and no solution out there. 2) It seems to be this problem for Vista users, including myself. Im not an expert on PC's but I do believe I have a good Idea as to what is causing the problem. Ive noticed that it stopped working after a Microsoft Update/Install. I did a "restore point", went back two days and now the mouse works. I then turnd off my "auto install" and I am now installing the updates one at a time to see if it is an update that has caused this. In the past two days there were a lot of installs so this may take a bit of time. When the mouse wasnt working: When Id plug it into the USB port a message of "need to install drive for device, will search the web for driver and will istall"..not exactly said that way but you get th point. After I accepted and it tried to carry out this task, the message now read "found driver but a file was missing, driver might have been written for windows95 or later. Contact manufacture to download the driver." Strange seeing Ive been using this mouse for 6mths, its fairly new and the clerk said it would work with Vista with no problems. My problem is, Im serving in Iraq and my mouse doesnt have a manufacture name or model on it and I obviously cant go back to where I bought it from. So I havent tried to go to the manufacture website to try this but even so, I believe this would not solve this. I have a buddy using the same mouse but hes using windows XP and he has not had this problem. Not to mention that when I was on the web searching for a solution, everyone had different mouses they were using. So am I to believe all these companys need their buyers to download drivers now, I highly doubt it. Not to mention that Im on here and I dont see logitech pushing to download a driver. After Ive talked to several guru PC lovers, based off of what Ive told them, They feel as though it was an install as well not a required driver. I have not found a solution as of yet and I havent finished re-installing the updates one at a time. If I do discover its an update causing this problem I will do three things: 1) tell as many people as I can of this 2) try and inform Microsoft.... 3) after informing Microsoft (if it was their update causing this) inform them that I am switching over to a MAC operating system never to return to them.

Well Im trying to install the drivers which they did not come with. I have the same problem. Try downloading the drivers at http://www.logitech.com/index.cfm/428/3295&cl=us,en