NPA is a virus affecting the banking sector. It affects liquidity and profitability, in addition affectation threat on quality of asset and survival of banks. The study explored movement of virus of indicator; gross NPA, Net NPA addition to NPA, Reduction of NPA and provision toward NPA and compare it with total advance and total deposit of bank. The study of utilize of bank group wise performance statistic and post millennium period up to the period ended 31 st December 2011. The study of utilize growth rate and calculating using AAG rate, correlation and regression study of analysis the movement of significance of NPA is indicators during the period. The effect in global financial crisis on the NPA is indicators as well are explained. The study conclude that NPA still remain that major threat and incremental component explained through additions NPA creates a great question mark to efficiency of credit risk management of Bank of India.