Oppo R5 ADB driver issue

I can't install my ADB driver in a Windows 7 64bit machine. When i tried to install the driver from the phone,nothing happens after hitting install. When i checked the properties of the driver from the phone, it's on "Read Only". I tried to install drivers but i have no luck.My phone is not rooted since it's still in warranty. Any suggestions?

FYI: Main reason I'm trying to install it is because for the Frep application. I'm getting an error device not found when I'm trying to run the .bat file in Frep for windows.

Any help will be greatly appreciated. Thanks!