Pull the wireless card from the slot and remove it. Remove one screw securing the CD/DVD drive and pull the drive from the notebook. Yellow screws securing the switch cover (keyboard cover). You’ll have to work with your fingers to disengage small plastic latches holding the switch cover. You’ll have to work with your fingers to disengage plastic latches securing the top cover. Before you remove the motherboard from the base assembly you have to disconnect the audio board cable.
Be careful, there is a thin ribbon cable running from the switch cover to the motherboard. Now you can lift up the top side of the keyboard and access the connector underneath the keyboard. Carefully lift up and remove the top cover assembly.
Sometimes the drivers stay lingering on your computer, long after the device is gone. What it does is suspend power being sent to a USB device, in order to save battery life of the computer.
That is the specific type of USB Host Controller for my computer. That will bring up a small menu like this one: Click on Uninstall.
In this guide I explain how to disassemble a Compaq Presario F700 notebook.
The guide might work for some other Compaq and HP models. UPDATE (January, 2011): Compaq Presario F700 specification says this laptop can support only 2GB RAM max (1GB per slot).
I think the disassembly steps will be very similar for Compaq Presario F500 and HP G6000 notebook PC. I just tested a Compaq Presario F700 (running Windows 7 Home Premium 32-bit OS) with two 2GB modules. After I installed two 2GB modules the laptop started properly. Remove all screws securing the top cover assembly from the bottom of the notebook.
If this guide works for your notebook, please mention the model name in the comments below. Lift up the right side of the hard drive by the plastic tab to disconnect it from the motherboard. In system properties I can see 3.19GB total RAM reported. I think that 3.19GB is only limitation of a 32-bit OS. Do not forget three (green) screws in the CD/DVD drive bay.