Hi i'm using acer 4720z for past one year.now i'm facing new problem like the system getting started normally and we can run any application, everything working fine but after 5 min its getting hanged ..even if i press ctrl alt del its not working.i cant able to shutdown the system .. i directly switched off the power.again if i start the system for first 5 min its working normally and again hanged..please provide me the solution???
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