Hey guys so I bought a new Hp Envy M6 recently, core i7 with a 1 TB HD. However, its C drive only has about 40 mb remaining. I've tried deleting stuff but it doesn't work and all the file that are already in it are important or unknown to me. My E drive has around 900 GB free but with a full C drive it doesnt matter. Any help? Is it possible to increase the size of the C drive? And is that safe?