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Hp m7030 with XP Media Center crashes at start up Screen

After a power outage the subject computer would blue screen and go back to boot menu.  Any menu choice would cause the same process.  Disalbled the boot option that caused the return to the boot menu and was able to read the blue screen.  Error 0x0000007B is reported.  Talk about a virus, bad hard drive or hard drive controllers and running Chkdsk /f.  Tried to run a bootable cd with antivirus programs and it would blue screen when it was trying to start its program (BartPE).
Removed drives.  there are 2 SATA 250G drives and 1 350G removeable drive.  I could see the removeable drive and one of the SATA drives when installed on my computer.  Ran my antivirus and malware with no infections.  The boot drive could be seen on my computer but when I tried to view the contents I received an error message, "Corrupt folder or file" and nothing would be displayed.  Ran chkdsk /f on the drive and it worked on the dirve for several hours.  Repaired? some corrupt sectors and worked on security ids for a long time.

Placing the drives back in the computer it will now boot to windows but numerous processed are not running.  ie - the explorer taskbar does not show up, windows explorer will not run.  

Well, it seemed time for a repair install.  CD runs until it says it is starting windows and the blue screen shows up.  Disconnected all the drives with the same result.  

Computer has 4 1G memory sticks.  Two of them will allow the XP CD to get to the point mentioned above and then blue screen.  The other two never let the computer start.  There are no POST signals, audible or visual.  

At this point I am sure I have two bad memory sticks and two questionable sticks.  the problem is definetely with the memory system.  How do I proceed?
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3 Solutions
This sounds like a similar situation I had a few years ago - power outage nuked my memsticks... I'd highly recommend downloading the Memtest86 boot cd from http://www.memtest86.com/ and running that on each of your memsticks (one at a time is your safest bet.) I wouldn't be surprised if they were all faulty, going by your description.

I think it could also be worth downloading the diagnostic tools from your hard drive manufacturer's website(s), as (let's hope not) your drives may be affected....

It could just be the dodgy RAM giving you those hard disk errors (if it is dodgy RAM, you may well have trouble running the diag tools.)

Fingers crossed :)
find all the diags you need on ubcd : http://www.ultimatebootcd.com/      
Here my troubleshooting procedure :
i suggest testing with the minimum setup - disconnect also all peripherals and network cables :
motherboard + cpu + 1 ram stick, video card, power supply
verify that the 4-pin cpu Aux power plug is connected
on boot, do you have a display?
if NO it is one of the connected, swap ram, Power supply, video card or monitor - leaving only motherboard and cpu
if Yes, add devices till the problem shows

you can also check the motherboard for bad capacitors as shown here :   www.badcaps.net
Do you have any feedback from trying the above suggestions, BobC68?
BobC68Author Commented:
Had multiple problems and the two answers directed me to all of them.  Sorry about the delay in getting back.  I have just gone through a death in the family during this time....thank you guys
sorry to hear that; it comes first of course

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