0xFFFFFFFFC0000005 = Access Violation (AV error)
A system thread (i.e a thread running in kernel mode) attempted to access some memory that it doesn't have permission to, or is an invalid memory address. Get the minidump file and we may be able to pinpoint the faulting module/driver
STOP 0x0000001E = Kernel Mode Exception Not Handled. Same type of error (Access Violation = 0xC0000005). Probably caused by the same thing that caused the previous BugCheck, as these two errors are similar.