I had just built a custom pc with hopes of running ubuntu with help from crossover, but when i found out for myself that it doesn't work most games that i love i ordered windows 7. It just arrived and i tried to install it, but it say that it is unrecognized, i looked at other posts and they say it is formatted to ext4. If this is true, how do i "un-format it". Then how would i formate it to operate windows