Hello I bought a SSD and installed in my case. I had searched before about SSD and came across the AHCI mode issue. Now I found that entry on BIOS BUT here is the question. If I set it to AHCI mode then install Windows on SSD, will my HDD which also has Windows installed, work fine? If won't, I will back up my files HDD and reformat it also but it would be very difficult for some reasons.