Sudden lags and freezes

Suddenly started to blunt the comp. In the games Sizzling sound and there was a wild brake, even in older games (darksiders, for example) is very basic word and Chrome. Did a system restore, rearranged the driver on the audio and graphics card, looking in what mode the hard drive, followed the temperature - nothing helped. It seems there is only the demolition of the system. But to find 5-6 hours to restore the desired state of a computer difficult. There might be a solution?