Hey everyone -- I originally came to
Experts' Exchange to address a bedeviling
c0000218 blue-screen error, but the discussion has kind of splintered a bit, so I'm going to open a new question.
In the original question, the consensus seems to be that the Ultimate Boot CD for Windows (
UBCD4Win) is the best method of repairing the registry error which is preventing me from booting my computer. The original source for the program is now defunct, but it still exists around the Internet largely as freeware. Though I'm convinced that the program may end up doing the job I need, it's been a bedeviling journey just to create the necessary file(s) to carry out the process. Several attempts to create or use the program have not ended successfully so far, and I'm at wits end to understand why. I will detail one of the more recent attempts below; to follow some of the previous attempts,
start with this comment on my other question; you could work upward or downward from there, I guess.
After a
recent failed attempt to build an .iso file from the program, I took a closer look at the log and found a pair of errors which caused the build to fail. As suggested by another forum user who commented on my update to the original topic, it turns out that the Windows XP operating system I'd been using to facilitate the build was corrupted by a couple of missing registry files, as the image below will show.

Since I'd already had some success by
switching the online source material for the UBCD4WIN .exe file, I tried doing the same with the source material for the XP operating system: the original source came from
WebForPC, but I switched over to
GetIntoPC's link to the software, found through the
PCRiver site. Using the new copy of the WinXP system, I conducted another attempted .iso build with the UBCD4WIN software, and it seemed to work -- no errors appeared, and the build seemed ready to go, but once it started, a long string of "
incorrect function" messages began appearing before the process finally managed to finish. Despite apparently finishing the .iso build successfully, the end result is shown in the following screengrab:

A completed ISO file with
NO INFORMATION saved to it. 0 bytes. Clearly, attempting to burn it to a disk or a USB would be pointless. As recently as yesterday evening/this morning, I've tried working with the program some more to try correcting the issue, but there's still been no real success as of yet.
Hence the new topic: acquiring the best prospective remedy for the registry error has become its own separate problem. Despite learning from early mistakes and trying some things differently, I still can't seem to get the program to work properly so that I can move into the next phase of correcting my computer's registry error. Using UBCD4WIN to fix the c0000218 error seems to be the key to the vault, but the key to the vault seems to need its own key, and it's been pretty frustrating in recent months. Again,
this link should take you to my original question at about where my attempts to use the UBCD4Win and the UBCD4Win Builder began, and on down should be the earlier attempts to create the needed .iso file, including a number of helpful screen captures and relevant file attachments, such as Builder logs. The Builder log for this latest attempt will also be attached below for your consideration.
If anyone here has ever managed to use the program successfully and can recommend any means of troubleshooting this issue, feel free to comment below. Better yet, if anyone has created an .iso file of the program and can offer a downloadable attachment of it here to help move this whole process along (I've done a couple of Google searches on "
ubcd4win iso" and "
ubcd4winbuilder iso" recently to see if one already exists for public consumption), feel free to do so as well.
Any helpful contributions from any of you are greatly appreciated -- thanx in advance!
:-)
Also once you get it going, the system you boot it on has to also be capable of running windows XP, and a machine that came with Windows 2000 might not work.