FIX "VEGAS Pro 11,12,13,14,15,16 is already installed" error 2019

I am unable to install  SONY Vegas pro  software on my computer. it shows the error message that " this software already installed on your system." i have checked the add or remove programs i didn't get it. the software folder was deleted from program file folder. i search the  Vegas  in C Drive. but it is unavailable. so how can i find the previous installation & how can i uninstall it from my system.

 FIX  This Error :- Here we are getting this error Because we are not completely or not properly uninstall Vegas pro software that's why this is not Allow to install again this program in same system

We did all things how much we know or how much we can like:-

Delete all Vegas files from C: Drive > Program Files , All temps files, End task from Task Manager, Restart System, Find Vegas Pro Folder or files in C: Driver Anywhere and delete all files after that we are facing this error again when come back to install program

So, Guys here we are missing something that we are not uninstall  Vegas  program from Registry Editor

Follow Below Instruction Video to Fix  "already installed error" of Sony Vegas 

Download Required Files :-

Versions	Links
Fix Sony Vegas 11	Click Here
Fix Sony Vegas 12	Click Here
Fix Sony Vegas 13	Click Here
Fix Sony Vegas 14	Click Here
Fix Sony Vegas 15	Click Here
Fix Sony Vegas 16	Click Here

Note:- if you are not find downloading files link try to open this page in desktop mode