It sounds like you have tried all the usual things that are referenced in articles.
Are you sure you tried Last Known Good?!
No Safe Mode?
I did find one article that looks like a good and safe idea and assumes some possible file corruption and you don't have any CDs with you, so can you burn a CD to create a bootable Recovery Console CD?
There are most likely other copies of the files on your HDD and the suspicious ones can be replaced with the copies.
I will borrow hints with credit to Amazing Andrew!
Download the xp_rec_con.iso file from here:http://www.mediafire.com/?ueyyzfymmig
I used the ImgBurn program referenced in the following link - worked first time:http://www.bleepingcomputer.com/tutorials/write-a-cd-dvd-image-or-iso/
Boot on the CD, make the obvious choices and responses to end up at what appears to be a command prompt.
Here is the article that makes sense and attempts to resolve the problem using Recovery Console to replace suspicious files with copies that should already be on your HDD. I looked and they are on my system where indicated:http://supportwiki.cisco.com/ViewWiki/inde...e_original_DLL_
Moving around in RC is different than what you may be used to in your regular DOS prompt. I found it frustrating at first and thought something was wrong, but it was me.
Spaces and backslashes to change directories and copy that are in the instructions look right.
This may not resolve your issue. But you will also won't make things any worse. Nothing gets deleted so you can always go back.
I imagine other ideas will be forthcoming, so you may want to accumulate a few and choose what sounds the best.
Edited by joseibarra, 20 July 2009 - 06:37 PM.