mouse and scroll bars behaving erratically

[Range_Rider]

Since latest Windows update the touchpad & mouse has been behaving erratically on both my HP Notebook & Omen laptop (both machines updated a few days apart)
The curser keeps highlighting everything on screen and the scroll bars don't function properly scrolling all the way down on its own when I attempt to scroll. When moving cursor across screen, it also opens a blue-lined box which expands as I scroll, I have to double click then right click to get rid of it but it just starts doing it all over again. 
I have tried all the usual fixes, upgrading drivers messing about with the mouse settings etc. On the Omen I even did a clean reset and all I have on screen now is the recycle bin and Microsoft Edge and the problem IS STILL THERE! Am now using the older HP Notebook which has the same problem with the scroll bar but not as bad as the Omen. 
Any help greatly appreciated.  

[sandytechy20 · Accepted solution]

@Range_Rider

Welcome to HP support community.

Check the Mouse options under control panel: 

Start → Control Panel → Mouse → Buttons tab.  

Check the box labeled "Use MS Office compatible scroll only."  

Also, check the box below labeled "Scroll in active window only." 

 
If the issue persists, attempt the below steps: 

Attempt using an alternate/external mouse.  

(If that works when the touchpad is disabled on Synaptic software, it would mean that it's a touchpad failure, 

However, if the external mouse doesn't work either, it could be a software/driver issue). 

Uninstall and reinstall the drivers for your mouse: 

Go to the Device Manager and select your mouse. Uninstall it and then restart your computer. During restart, your mouse driver will automatically be reinstalled. 

• 1.   Click on Start and type ‘Device Manager’. 

• 2.   Click Device Manager. 

• 3.   Click + sign next to Mouse. 

• 4.   Right-click on mouse entry and choose "uninstall". 

• 5.   Restart your computer. 

I hope that helps.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.