I got a New Problem
My Router's Power Adapter is Broken and My Other Power packs' Power isn't Enough for the Router.
So I tried to install my Modem again. Last time When I try to Uninstall it last time it didn't succeed(Said Can't find /Key and bla bla ...) So I Manually deleted the files and removed Registry Entries
And This time I tried to install it again but it says, Modem is Already installed remove it and then Install. So I searched C drive for files and then deleted the files. But Still same. Still say it's already installed but there is no any file is left that i can see.
So I had to take my Uncle's Suntel CDMA Phone's Power Adapter and Connect my Router's Power Adapter's Cable by Sticking Sellotapes

My Question is How to Install Modem Drivers Again? Because I am thinking to use the Modem until I buy another Power Adapter.