Never delete your secure zone!

I had already posted this as a problem. Now that I have gone through the whole misery this is just a warning what you should never do!

Here is what I did:
Missing a help or FAQ note how I could delete the old backups in my secure zone which I did not need any more because of a system upgrade, and there was too little space for the new system image, I deleted the whole secure zone and wanted to replace it by a bigger one.

Acronis True Image Home 11 gave NO WARNING that this could be dangerous.

Well, it started harmlessly whistling, doing its work and all seemed okay and of a sudden my monitor (dis)played "sky". You know, that charming blue screen. With (what I found out later) an idiotic Stop Code which reappeared stubbornly with each attempt to restart Windows (XP), repair was not possible either. BART did not help either. Even when I put the HD into another PC the blue screen appeared.

At least, I could save an image from my freshly installed C: to another PC by booting Acronis from CD, and I could boot and get to my work files with an Ubuntu CD, so I could save all my actual files to an external HD (which Acronis could not do from outside the system, what a pity! That would have saved me much time!). RAM, CPU and HD were quite okay, Ubuntu told me, so I am sure now that the only cause for this whole disaster could be that the system was confused with the last partition which had changed its letter and on the next attempt had disappeared altogether: Acronis, by deleting the SZ, had overdone it a bit and had deleted the last partition coming after its own place on the disk, where the newly won space should be added and where I had stored all my 1:1 archive copies for quick search, lots of them not any more existing on my work partition.
Today, I have installed a new HD and thanksgod got my system back from this late Acronis image, and my work files from my external disk and I am already half glad.
Tomorrow I shall cancel all the partitions on my old HD and then reinstall it in my PC and hopefully have no blue disk any more and still more hopefully Recuva oder TestDisk will be able to recover the approximately 1000 lost files. Anyway, nobody recovers my 5 days googling and phoning and reading and chasing after the cause.

So, never delete your SZ even if that program suggests you such a possibility. You will most certainly weep before your never ending blue screen.