So I cleaned my case today . Mostly cpu and gpu I did't even touch the hard drives or their cables. When I started my PC it said BOOTMGR is missing so I went to the bios and in the boot and I could only see removable device boot my dvd-rw rom and my other hard drive whitch I use for storage but not the one with windows on it. I tried different cables other sata power cable from the psu, different sata ports, reseted cmos but nothing. It wqs working fine before. Any suggestions? If it is broken what could have broke it.