Bug Check 0xF4 indicates CRITICAL_OBJECT_TERMINATION with a secondary string of 0x3, meaning up to seven critical processes (like say an instance of svchost or winlogon) were terminated unexpectedly. This is relatively rare and only typically happens if these critical processes are infected by a polymorphic virus of sorts, or could be the indication of a faulty processing unit. If it persists, run chkdsk /f, an anti-virus scan, or try a System Restore.