Hi I have a HP dc7700 PC. I had 1 Sata 80Gb HDD and yesterday i bought a 250GB HD to increase my storage. After Installation, BIOS detects the Drive but I cannot boot when it is installed. The screen stays black when where the windows logo appears and when i try to install a new windows, the screen also remains black. If i remove the 80GB and just use 250GB then the system starts to boot from the network and says no system file found. Tried installing windows after that too but every DvD stays stuck, even tried bootable USB. Is it fault with my new HDD or BIOS or my SATA Configuration?