Need Urgent Help Plz

[Rehman shar]

Kya Hal hain Dosto?
Yaar 2 Din pehle Mera PC Chalte Chalte Achank Restart hone Laga Lekin Phir isi Trah On Hone se pehle hi Phir se Restart hone lagta 3,4 Dafa Aisa kia to Mene Dost k Mashware se MotherBoard ko Achhi Trah Waash kar k 2 Din tak Sukhaya or Aj Dry Machine B laga k phir jab ON kia to Nai Chal raha Or Ye Message aata hai "Non-system disk or disk error, replace and strike any key when ready"
Yaar Mene har Tarah ki koshish kar k dekhli motherBoard ka Cell b change kia magar PC nai chal raha, Mene "F10 Setup" men ja kar Time date waghaira b Set kia Or Boot Option men dekha to Sirf USB show ho raha hai,,
Maze ki baat ye k Mene Apna Processor, RAM or HarDisk dosre PC men Chala k check kiye to Baghair kisi Masle k Chal rahe hain,, Par Mere Apne PC Nai chal chal raha,,
Plz koi Sulotion batao Yara,,
Main Kuch Screen Shot b de raha hon Kindly Help me Plzzzzzzzz