Games lag untill i reinstall my nvidia graphic after rebooting

  ChaminRandaya 07:15 23 Nov 2014

well i bought my new laptop recently.the problem is when i try to play games i have to re install my graphic driver every time i restart my lap after few hours unless i always get unplayable frame rates but re installing graphic driver fixes this.I removed old drivers and and re installed the drivers still did not work,also i don't have asus gamer OSD which seems cause the same trouble to some others.well i can still play games but its very annoying to reinstall the drivers again and again :C please give a solution .(also games are running on dedicated graphic card i tested that)

i have a dell inspiron15 3542 Intel(R) Core(TM) i7-4510U CPU @ 2.00GHz 8gb ram Geforce 840m 2gb Windows 8.1 64-bit

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