Thanks for help all members of this amazing site especailly H.....my issue was fixed by changing Limit CPUID MaxVal (Disabled).....and Intel XD Bit (Enabled) in bios and reboot with -v -x..now i have an other issue...i m connected but no internet connection on modem 4Glt ... card ethernet..realtek 8181 installed by multibest....any help ...thanks a lot