I have Microsoft Ultimate Office 2007 installed on my Vista machine.  It has
worked fine for many months.  I have encountered a problem with Word today.  
I began to type text into a document but can't use my mouse.  I can move the
cursor by using the arrow keys, but not the mouse.  The mouse works in all
other applications.  When I close the document I get an error that Word has
stopped working and it is checking for the problem.  I then get another error
that says Word has stopped working and will close and I will be notified if
there is a solution.  Word then automatically opens again and I have to click
to close - this happens about three or four times before it finally closes
for good.  During one of these episodes, Internet Explorer quit working and
reopened itself, too.  Anyone have any ideas?