The bad news is that ultimately the mouse failed again. The good news is
that I solved the problem by taking the mouse to Best Buy where a
knowledgable young man plugged it into a computer there and voila!, the
cursor froze! So I bought this terrific wireless optical mouse (Logitech
LX7) which has worked perfectly since I installed it.
In fact, the installation has turned out to be better than perfect. The
system response has sped up enormously! The various windows now build almost
instantaneously in many cases. Up to now my PC has been kind of a dog. (My
daughter has said unkind things about it on numerous occasions.)
The old mouse was a PS/2 mouse that came with my HP Pavilion 734n computer.
The new mouse, of course, uses a USB port (instead of the PS/2 port). Could
the old mouse have been preventing, or unable to take advantage of, hardware
acceleration?
The only slight problem remaining is that when the PC comes out of standby,
the monitor shuts off so that I have to push the button on the front of it to
turn it on. This behavior started after the old mouse began to fail and
persists with the installation of the new mouse. Any ideas?
As to the drivers, I recently rebuilt my hard drive and installed the latest
HP recommended nVidia drivers in preparation for the SP2 upgrade. Whether
there are more recent driver updates, I can't say. I will check out the
manufacturer's website.