I love how everyone who has not experienced this problem is so quick to say
that it's just the user accidentally touching the touchpad. I am an IT
professional myself and I have had this problem on 3 laptops now. Different
brands, different OS, different touchpad drivers, etc. I have gone as far as
disabling the touchpad, but even then I have the same problems (cursor
jumping, windows closing, etc.) There seems to be a flaw in the Windows OS
when it comes to the touchpad. The only thing I have found that has helped me
is a little program called TouchFreeze. You can download it for free from
several places (just do a Google search) but I'll post a link below. Since I
downloaded and installed it, I have not had the problem. I wish I had the
time to analyze the code to see what it is actually doing. The program is
supposed to simply disable the touchpad while one is typing. I wish
Microsoft would take a look at this and get a patch released to fix it!
http://code.google.com/p/touchfreeze/