Windows 7 Need Help Cannot Install A Program

[Hakubi]

Today my computer is hijacked by omnibox, because i'm new at computer i follow what people said and use adwcleaner buat after i use it my YTD downloader got removed and i can't install it again. windows said that it cannot find the setup file (like the picture i attached). what's the cause of this and how do i fix it ?

 

[helpifIcan]

What is drive F:, SSD, HD, DVD?
If DVD is the DVD/CD in the drive?
If SSD, HD the program is missing and you will need to get it from the source.