0d215a50_LLER____Fix_Blue_Screen_Errors__Cause_of_Error
[Parameter 1] 0x07 [Parameter 2] Reserved [Parameter 3] Pool header contents [Parameter 4] Address of the block of pool being freed [Cause of Error] 
The current thread attempted to free the pool, which was already freed.
What is STOP 0x000000C2 : BAD_POOL_CALLER? - Fix Blue Screen Errors
Cause of Error