Hi, I am Rob and i will do my best to help you here. If the mouse worked in the last week or so you might try a system restore to a time when it was working. Instructions below.
understand that the mouse on the laptop may just be physically broken. you can get a usb mouse for 10 or 20 bucks that just plugs in. If nothing else works that may be the cheapest and easiest solution. it would also make it much easier to do the trouble shooting to try to get the built in one working.
But you can navigate with the tab / arrow / enter key to get to almost anything without the mouse. you have to use the tabs or arrows until it is highlighted on what you want to click and then hit enter to click
System restore instructions - windows 7 8 10
hold the windows logo key and hit R
in the box that appears type
select restore to an earlier date.
Under the "suggested restore" which is usually not old enough to help is a link for "OTHER RESTORE POINTS"
click that if the suggested ones are not BEFORE THE PROBLEM STARTED
choose a date from the calendar that is BEFORE you experienced the problem
hit ok / restore
the computer will start to shut down
a restoring settings box will appear with a status bar
when it finishes your computer will restart with the same settings it had on the date you restored to. your data will not be affected.
It is not perfect. But it fixes a lot of things.