You've given us very little info to work with. What are you hardware specs? What OS? By "I changed windows for several times the issue resolved & get back again each time.", do you mean you formatted your hard drive and then installed Windows, or what? In other words, exactly what do you mean by "changed windows"?
How this problem been getting progressively worse, or did it start suddenly? How old is your computer? Make and model? Have you ever opened it to clean dust out of the inside? Any idea what temperature your processor normally runs at? How many cooling fans inside? Have you added hardware components since you've owned the computer? What's the capacity of the power supply unit in your computer?
