A repair of Windows is needed, possibly even a clean install.
To move system files from drive to drive you need to use Macrium Reflect, or similar imaging / cloning software.
When Windows is running ok again click Start then click on "Your Name" at the top of the list of places. The folders that appear here can be moved to another drive - E in your case.
To do this Select All, Copy and Paste onto E Drive. Then Right click on the folder, Select properties Location and Move to the coressponding folder on E. Yes to move. You need to do this for each folder. Once done your Documents, music etc. will be stored on E drive leaving C for the operating system