Power edge 2900 - Blue Screen UNEXPECTED_KERNEL_MODE_TRAP

Hello all,

W2008 server 64 Bits.

We have a big problem in this server with a blue screen every 15 minutes .... he stop and start again....

UNEXPECTED_KERNEL_MODE_TRAP - 

0x0000007f - 00000000`00000008 - 00000000`80050031- 00000000`000006f8- fffff800`01b419d7

cause by driver : ntoskrnl.exe

caused by adress : ntoskrnl.exe+93ba0*

Crash adress : ntoskrnl.exe+93ba0

Did you have any suggestion to do ? 

Thank you for your help and time.