I have been running a Dell 530S for almost 4 years with vista, four days ago i installed windows updates through the windows update program installed on my computer. three days ago i received the first BSOD with the following error MEMORY_MANAGEMENT, since then i have been unable to start windows even in safe mode. I get several different BSOD messages including BAD_POOL_CALLER, PAGE_FAULT_IN_NONPAGED_AREA, IRQL_NOT_LESS_OR_EQUAL. I have run a boot system test (F12) on the partition the extended test (3 hours)with no errors, Memory test came back with a memory compare error, I need to know what to do next.