Help w/Removing Double Click

So Ive dealt with this long enough and its time to get rid of it.

 

About 90% of the time when I left click, I register two clicks. I have a virus that is causing me to double click on everything. If I click to open a new tab, it opens two. If I click to move the cursor it highlights a word. etc etc...

 

Im currently using Norton Internet Security version 18.7.1.3

 

I regularly run CCleaner, Full System Scans and Security Update.

 

The only thing I can think to do at this point is a complete reformat, which obviously Id prefer not to do....

 

Any feedback is appreciated, thanks in advance.