I tried. I picked the custom one so it erase everything. But it never asked me for my CD key or anything like that. After the installation, its still my old wallpaper and nothing has changed, it just created a folder called Windows old. Are you sure this is a fresh replacement? Because shouldn't it be bigger than 4GB?
So um I just re-installed my system because of no internet connection for me and my ISP told me that my computer is the one that using 90% of the bandwidth. After the help from M.Poriff and others I was able to regain internet connection.
Still with fairly slow speed at 2mbps(normal is 15-20 mbps) , I decided to restore my system completely hoping to resolve to problem. But after 4 hours of restoring, the problem is still there--- extremely slow internet sometimes and Caspa showing over 7000 packets and sometimes 40000 sent/received.
After some research and figuring out, I found out that explorer.exe was using the most bandwidth(I did this by typing netstat -antb into the cmd. So if you guys know why is the user interface and menu(explorer.exe) is using so much bandwidth, please help. Thanks!
Here are the screen shots for Caspa and cmd.
http://postimg.org/gallery/p2iae1xy/6ece2b3f/

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