Hi, i just got this pc yesterday and recently found out that it came with a Disk that was to install a windows 10 pro 64 bit. However, when i tried i remove all my files when it asked to keep my files or remove all. After i did i ran into problems, so i panicked and tryed to reload my windows 7 32 bit. But now im stuck everytime i turn the pc on it says "No bootable devices--strike F1 to retry boot, F2 for setup utility Press F5 to run onboard dagnostics." I've seen other forums but they involve the BIOS.When i bought the pc and did everything i could i realized that it did not come with BIOS{which had to be downloaded manually} I am now confused.

Please help!!!