Two annoying problems

Hello,
First problem: I recently built my first desktop and did every single part carefully. I got rid of any electric shock stored in me and even did an external boot-up test and heard the single beep noise. After that I put all the parts into the tower case with the right stand offs and screws. I press the power button, it gets to the BIOS and it just stays there frozen. I try to press DEL and nothing happens.

Second Problem: For some unknown reason if I spam DEL I can get to the BIOS and actually change settings, everything reads fine and is at the perfect temp 30-40 degrees celcius. It reads my mouse/keyboard/hdd/odd all correctly. However trying to install Windows 7 64-bit home premium is where the problem begins. It can't detect my HDD, I tried changing to AHCI to IDE and vice versa. I even tried turning the desktop off unplugging it and the same thing happens.

Mobo: gigabyte h61ma-d2v
CPU: Intel i5 3rd gen
RAM: g.skill 1066 2x2GB
GPU: hd6670 2gb amd radeon hd
PSU: coolermaster 525w
ODD: LG
HDD: 500gb seagate

I tried unplugging parts one by one and turning on the pc still no luck (two problems keep arising). Please help it has been almost 7 hours and I can't get anywhere.