windows media centre m7480 c000021a

I have a media centre m7480 and wanted to do a full system recovery. When I tried this, I got a blue screen telling me:- Stop: c000021a {Fatal System Error} The windows Logon process terminated unexpectedly with a status of 0x0000034 (0x00000000 0x00000000).

I have tried following previous answers on the forum from users whom had the same problem. I cannot, despite trying, get past this problem.
The manual tells me that one set of Recovery discs can be made for this computer, so I tried to make a set, but got a message telling me that a set had already been made and that another cannot be made. I bought this comp in 2006 and simply do not recall ever making a set of recovery discs - ever. If I did, I would never know where they are now.
Does any techie know how to get me out of this problem?
I am very computer savvy as you can probably see from my post, but I'm trying to improve.:ohmy:

Best Regards
Linsky

Have a look at the microsoft's article for this issue : http://support.microsoft.com/kb/316503 and http://support.microsoft.com/default...b;en-us;156669

Refer to following threads:

http://forums.techarena.in/windows-update/726552.htm
http://forums.techarena.in/windows-x...ort/603447.htm
http://forums.techarena.in/windows-x...ort/230853.htm
http://forums.techarena.in/windows-xp-support/33084.htm