How to replace a HP Compaq 610 touchpad - BenQ Joybook 5100U Notebook

Use a usb mouse uninstall the touchpad then reinstall

OK, what is the question?

You have to download an add-on from the available software downloads for your device on the website.
All you need to do is to follow the link below and scroll down to the Driver-keyboard, mouse and input device section.
Download the first file that says Synaptics TouchPad Driver.
After download, install the file and restart your computer. This would help you use your touchpad scroll again.
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you might want to check below link, http://welcome.hp.com/country/us/en/support.html

try to uninstall/reinstall the driver of your touchpad and the software after removing the driver restart the computer and reinstall it including the software if still doesnt work try to boot to safe mode to check if it still not working if it still doesnt then it needs to be replaced

its a software issue.
try reinstalling the webcam driver, if the problem remains there then reinstall the operating system

You will need to install the WIndows 7 drivers for your touchpad from HP. I have recently been on HP's site and find VERY few Win-7 drivers for any of the older machines.

It's better and easier to just replace the whole touch pad assembly and top cover. It's all one piece...much easier and cost is the same.

This is the part number:
457616-001

i am using windows 7 in my laptop compaq610 model webcam device is already installed but it is not networking.is any software to be used or what?

There are two reasons for this, wrong or missing touchpad driver, or scrolling is disabled. First go to HP... http://welcome.hp.com/country/us/en/support.html

put in your exact model number and click on the drivers link, download the touchpad driver and install, scrolling is automatically enabled. When you download a new driver it will over-write the present one and all it's settings.