Cursor erratic and impossible to control

Thank you for getting back to me. However, method 1 makes no sense whatsoever. I type Troubleshooting and it just takes me directly to an internet search. The other two methods make little difference. 

I didn't download anything from Lenovo because it's not something that would have occurred to me. Now I cannot do it because controlling the cursor to get that far is impossible. Basically, it keeps jumping back to the bottom of the screen and opening random things. 

I'm pretty annoyed that I've been duped into being a guinea pig for this incomplete version of Windows when I had finally managed to make my peace with Windows 8. Now it seems I'm going to have to spend money on having an engineer sort my laptop out for me which I can ill-afford at the moment. 

This is the final straw for me. I doubt very much I will make the mistake of investing in a Windows operating system again.

I just want to let you know, I have managed to revert back to Windows 8 and the problem seems to have gone away so I'm going to stick with that for the time being.

I probably didn't seem too grateful yesterday. I really do appreciate your response.

However, as I said, I wish Microsoft would get its products right. All we want is a reliable, relatively user-friendly operating system that we don't have to pay the earth for. I think many of us mortals were quite content with Windows XP. We don't all desire Apple's singing-dancing bonanza.

-Uncheck the Hide pointer while typing box. (give in steps)"  

That did help quite a bit.  It didn't totally resolve the problem but made it a little more bearable.  Instead of the cursor jumping every other word, it let me type almost a whole paragraph before starting to jump again.  I'm open to any suggestions to make it go away completely.

I have tried all of the tips from all of the forums (including ALL of the ones on here!) and nothing seems to work!! I have Sony VAIO Fit and running Windows 10 (I'm also not tech advanced so that's all I really know). I have checked and unchecked all the recommended boxes and bits in properties tabs and installed Touchfreeze several times, run the troubleshooter, checked the drivers and even rolled them back and have rebooted my PC many times... to no avail. The cursor has a complete mind of it's own. Even as I'm typing this it keeps opening links on the page and closing things and moving the page and other very annoying things... all since the Windows 10 upgrade????
It does seems to keep jumping to the same consistent location (which changes from time to time but then remains clicking to the new location)....?? Please help, is this a Windows Bug? Or a driver issue?
I tried finding the driver for a Sony VAIO Fit in Australia but with no success 

PLEASE HELP