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.If the BSOD's are random in order and headings...as it appears they are that points to 2 possible culprits...
PSU or RAM.

Borrow a known good PSU of the same or greater WATTAGE and swap it in there overnite...

For the RAM DLoad MemTest and follow the info at their site for creating a bootable CD...
Let it run at least 2 hours...

Sounds like bad RAM to me though...Running MemTest86 version 4.0 now it is showing all test failing over 50000 errors and only running 15 minutes. This doesn't seem rightYou have at least 1 stik of bad RAM.i have 4 memory sticks Dell help says before i remove 2 and 4 i need to take out the battery and a PCI 16 card is this neccessary, or can i just remove the memory cards and test them individually in slot 1after running memtest86 i removed a bad memory stick and all is well now thanks for all the help.Are you sure it's the memory module or not just a bad slot or dust in the slot?
BTW, RAM Slot#1 (Item 3 in the pic) is the one CLOSEST to the CPU.

See memory install guidelines in link below.
http://support.dell.com/support/edocs/systems/insp530s/en/OM/HTML/parts.htm#wp1184332