Default USB not recognised as Media Device

Hello ppl. I successfully rooted the phone, but after that PC doesn't recognise it as Media device and only as camera interface. Phone is not recognised even in windows device manager after ticking the "Media Device" in android. When I untick this option it is shown like that (which should be fine after ticking the option, not after unticking it I think:

I know I have to update the drivers ( I downloaded them from here) but it's allowing me to do so, because after I choose "Media Device" in USB android menu, the phone disappears completely in windows device manager..

Please help me, much appreciated.