Thanks, Darlene, for the great responses/input
From a reliable source used by many to get a handle on STOP errors:0x00000019: BAD_POOL_HEADER
A pool header issue is a problem with Windows memory allocation. Device driver issues are probably the most common, but this can have diverse causes including bad sectors or other disk write issues, and problems with some routers. (By theory, RAM problems would be suspect for memory pool issues, but I havenít been able to confirm this as a cause.)0x0000004E: PFN_LIST_CORRUPT
This indicates that the memory management Page File Number list is corrupted. Can be caused by corrupt physical RAM, or by drivers passing bad memory descriptor lists.0x000000FE: BUGCODE_USB_DRIVER
Usually indicates a USB driver problem. Make sure, though, that you have the latest Windows service pack installed.0x0000000A: IRQL_NOT_LESS_OR_EQUAL
Typically due to a bad driver, or faulty or incompatible hardware or software. Use the General Troubleshooting of STOP Messages checklist above. Technically, this error condition means that a kernel-mode process or driver tried to access a memory location to which it did not have permission, or at a kernel Interrupt ReQuest Level (IRQL) that was too high. (A kernel-mode process can access only other processes that have an IRQL lower than, or equal to, its own.)
The common element that I would see in diverse STOP errors such as these...would be that they all affect RAM, if not occur in RAM (with exception to the USB driver error noted).
A look at your Device Manager indicates that the system doesn't think it has any driver problems and, for the moment, I will agree.
There are two components that I think should be tested immediately: RAM and your hard drive. Fortunately, we have reliable diagnostic tests which a user can employ to check these two items out. It will take a little time (it's probably best to run Memtest overnight and the hard drive diagnostic may take a couple of hours), but it will be time well-spent, if only we can eliminate/confirm any suspicion that might be cast on these two components.
Although the detail you provided was great, it doesn't tell me what components you replaced the original CPU/motherboard/RAM with. There may have been an inconsistency with the components installed, since you say that your system troubles began at that point.
Can you tell us what motherboard (brand and model)?
The RAM data we can actually get from the Memtest run and I can see that you installed a P4 CPU running at 2.8.
I'd also like to know...why such wholesale changes at once?
Any known malware issues, before the change or since?
Now to address the hard drive test. To run the diagnostic, you will need to download a small program and then either burn it to CD or put it on floppy (some users have no floppy drives/floppies).http://seagate.custkb.com/seagate/crm/self...sp?DocId=201271
In order to run it, you will have to change the boot order in the BIOS. Current settings probaby call for the hard drive as the first boot device. In order to boot from the floppy drive and run the diagnostic, the first boot option must be changed in your BIOS settings.
Now, the RAM test. Similar procedure, with the exception that you will download an .iso file from the Memtest site.
Memtest86.com - Memory Diagnostic - http://www.memtest86.com/
MemTest Manual - http://hcidesign.com/memtest/manual.html
Once you have the .iso file, you must also download a program which will burn the .iso file into a bootable CD. There are any number of programs that perform this somewhat "special" function of turning .iso files into bootable CDs. I tend to use Active@ ISO Burner - http://www.ntfs.com/iso_burner_free.htm
because I think it's easy. The important thing is to use an .iso-burning program so that the result will be a bootable CD, not just a CD.
Once you have the bootable CD made, it's the same drill for running the diagnostic: Change the boot options in the BIOS, let the CD do its job.
This may seem like a lot...it seems like a lot to me. If you have any questions about anything I've asked or attempted to spell out...ask
. Someone here will clarify, correct...whatever might be necessary.