Memory write/read failure

While using my Dell Optiplex 745 with Windows 7, I was given the following message:
Memory read/write failure at CFE53BA8, read 0AE508E5 expecting 0AE50AE5
Memory address line failure at CFE50000, read 0AE50AE5 expecting 1A1A1A1A
When I restarted in Safe Mode with Networking, I got the following error message:
BAD_POOL_HEADER
***STOP:  0x00000019 (0x00000022, 0x000010000, 0x00000000, 0x00000000)
I’ve run diagnostics on all of my hardware, and everything comes up perfect. What’s going on, and how do I repair the issue?
This is the second time I’ve seen this error. I tried to do a CHKDSK after the first occurrence, but the process stalled after 32 percent was completed during stage 4.

I was ready to save a disk image of my C: drive, but don't want to until everything is fail safe.
BillMiesAsked:
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BillMiesAuthor Commented:
I was read to save a disk image of my C: drive, but don't want to until everything is fail safe.
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Aj8787Commented:
First I would suggest that you perform startup repair and check if it works.

 

You can run the Startup Repair tool by using the Windows Vista or Windows 7 installation disc or by using the computer's preinstalled recovery options.

 

To run the Startup Repair tool by using the Windows Vista or Windows 7 installation disc
 
If you have the Windows Vista or Windows 7 installation disc, follow these steps to use the Startup Repair tool:

 

1.
 Insert the Windows Vista installation disc.

Note The computer must be configured to start from a CD or from a DVD. For information about how to configure the computer to start from a CD or from a DVD, see the information that came with the computer.
 

 

2.
 Restart the computer. To do this, click Start, click the arrow next to the Lock button, and then click Restart

Note If you cannot restart the computer by using this method, use the power button to turn off the computer. Then, turn the computer back on.
 
3.
 Set your language preference, and then click Next

Note In most cases, the startup repair process starts automatically, and you do not have the option to select it in the System Recovery Options menu.
 
4.
 Click Repair your computer.
 
5.
 In the System Recovery Options dialog box, click the operating system that you want to repair, and then click Next  
 
6.
 In the System Recovery Options menu, click Startup Repair to start the repair process.
 
7.
 When the repair process is complete, click Finish
 

 

If the above step does not fix the issue would suggest that you perform a System Restore on the computer to restore back the previous settings when it was working fine.

To use the Windows Recovery Environment, you must have the Windows Vista or Windows 7 installation disc. To start the Windows Recovery Environment, follow these steps:

 

1.
 Put the installation disc in the disc drive, and then start the computer.
 
2.
 Press a key when you are prompted.
 
3.
 Select a language, a time and currency, and a keyboard or input method, and then click Next.
 
4.
 Click Repair your computer  
 
5.
 In the System Recovery Options dialog box, click the operating system that you want to repair, and then click Next
 

In the System Recovery Options dialog box, click System Restore to restore the operating system to the restore point that was created when the program or the driver was installed.

 

 

Refer the below link for more information.

http://windows.microsoft.com/en-US/windows7/Restore-your-computer-from-a-system-image-backup


 

A Stop error occurs, or the computer stops responding when you try to start Windows Vista or Windows 7
http://support.microsoft.com/kb/925810

 

 

This error can occur if you have a digital camera or scanner connected, but can also be caused by other device drivers or any device.

 

For more information refer the below link.

FIX: Error message when you connect a scanner or a digital camera to a computer that is running Windows Vista or Windows XP Service Pack 2: "BAD_POOL_HEADER STOP"

http://support.microsoft.com/kb/934177
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nobusCommented:
i suppose your disk  has problems - or the onboard disk controller.
i suggest to run the  long  diag for your disk brand :   http://www.tacktech.com/display.cfm?ttid=287
or from the ubcd : http://www.ultimatebootcd.com/      
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BillMiesAuthor Commented:
Neither comment has helped. I had tried all of that previously. All of my hardware has checked, both before when I had had this problem the first time, as well as yesterday.
I now get the error "IRQL_NOT_LESS_OR_EQUAL" as well as:
***STOP: 0x0000000A (0x00000002, 0x00000002, 0x00000001, 0x8A888870)
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nobusCommented:
i would start with 1 ram stick -  test it, then swap it with others !
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BillMiesAuthor Commented:
I'll be out-of-town for a week. Will try an elimination of RAM when I return.
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nobusCommented:
run hijackthis, and post the log file
or run these :
     Spybot :        http://www.download.com/3000-8022-10122137.html
http://www.malwarebytes.org/mbam.php                         MBAM
http://download.bleepingcomputer.com/sUBs/ComboFix.exe            Combofix
http://www.spychecker.com/program/hijackthis.html                                       download
http://www.hijackthis.de/index.php?langselect=english              check the log
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BillMiesAuthor Commented:
Sorry for the delay, but I was out-of-town longer than I had anticipated.  For the time being, this seems to have solved the problem. I had already run SpyBot, Malwarebytes, etc. and my system was and has been clean. Thanks for your help.
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nobusCommented:
tx for the feedback - but wat solved the problem?
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