I created a new partition from a large partition on my 3TB WD HDD to clean install windows.I used a programme to achieve that, comp could not recognize my HD after that.Restarted my comp to see it get hanged at the Hp logo,restarted again to enter into bios or any of the F key menu which also hangs there.I removed the HD and comp was able to bypass the Hp logo successfully and even enter into the F key menus.With HD still removed I created a bootable pen drive and the comp hanged up at the Hp logo again.I inserted an external HD and still face the same challenge.