Please Help Me Slow Down My Computer

Lately my laptop appears to have become over-sensitive and reactive to my slightest move, particularly when I most need it not to.
My system is an HP G62 Notebook PC (G62-225NR), Pentium Dual-Core CPU (T4500) running at 2.30 GHz, 8 GB RAM, 64-bit Windows 7 OS.

My complaints are:

Single mouse clicks become double, triple, or even quadruple clicks.
I have tried going into Control Panel > Mouse > Double Click Speed and repeatedly changed the slider from fastest to slowest and vice versa without satisfaction.
One must click on a check box many, many times before my on or off choice will finally stick.
When trying to simply move a window by dragging it to a new location the window will suddenly jump up to take up the entire screen, even when I don't want it to.
And, when I make a selection of text using my mouse (as in preparation to move, copy, or cut it) the selection immediately goes away the instant I raise my finger off the left button and is lost. It is NOT copied to the clipboard. In order get get a selection of text to be copied to the clipboard I must hold down an arrow key with one finger while holding down a shift key to make the selection again.

These problems are driving me nuts. What can I do to better bring my computer under control?

Hi there
Although it seems unrelated a lot of problems are caused by the Touchpad --some people for example experience the cursor randomly jumping all over the place when typing making any sort of input impossible.

Install the generic SYNAPTICS driver and disable the touchpad via the control panel.

Drivers | Synaptics

You'll probably find this fixes the problem !!.

Cheers
jimbo

Thanks, Jimbo, I'm giving it a try.