Hello everyone,
As I've been using this greatest laptop I bought a year ago, I never had this kind of problem. The laptop has been effected by viruses in the past, had other little software problems because of installing game mods etc. One month ago, my Dad sent the laptop to the shop because the screen got broken. After he called us back that it's repaired, my Dad told him to clean the fan of the laptop because it was full of dirt. He cleaned it, disconnected the HDD and when he connected it back, he didn't turn on the laptop, assembled the back cover back etc. When we turned it on, it showed up this message, the HDD doesn't shows up in BIOS. It's broken or something? And if it's broken, can I install Windows 7 on a USB? Help would be appreciated.