0d215a50_LLER____Fix_Blue_Screen_Errors__Cause_of_Error
[Parameter 1] 0x50 [Parameter 2] Starting address [Parameter 3] Start offset, in pages, from beginning of paged pool [Parameter 4] Size of paged pool, in bytes [Cause of Error] 
The current thread attempted to free a non-allocated paged pool address.
What is STOP 0x000000C2 : BAD_POOL_CALLER? - Fix Blue Screen Errors
Cause of Error