Try these steps...
1.) In your old PC, go to Start->Run and type "%appdata%/utorrent", press ENTER and backup the entire contents of this directory.
2.) Copy your seeded files from your old PC to your new PC. Make sure that the destination path of your seeded files mirrors the path of your old PC (including the drive letter).
3.) Install uTorrent on your new PC. Just to be sure, I would recommend installing the same version of uTorrent that you are running on your old PC.
4.) After installation, go to Start->Run and type "%appdata%/utorrent" and press ENTER. Copy the files that you backed up during step 1 to this directory.
5.) Start uTorrent on your new PC, it should display the same files that you seeded on your old PC including its statistics.