User Data Lost

All the user data, in fact all of the user accounts on a pc running XP Home sp3 seem to have been lost. Instead of the folders within documents and settings all that appears when the hard drive is placed in another pc (or viewed via Knoppix live cd) is a small file that has the user account name on it.

I guess the formatting has been lost but is there anyway of getting things back as they were to recover the data?
alfaroAsked:
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alfaroConnect With a Mentor Author Commented:
Bingo... Using Tree Size Pro I saw that there was  an awful lot of data in the Erdoundocache folder. A bit of poking around and I found the entire user account...
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bitlaCommented:
Recovery will not work always and data that can be recovered will less than 100%, but still there is a chance.

Two way can be done Manually and using tools.

Manually
=========

You might be lucky if you set or enable System Restore. If enabled follow these steps.

1.)Open My computer
2)Click Tool---> folder options--> view---> uncheck Hide Protected System Files
and also select Show Hidden Files and FOlders
3) Now open drive letter say D: find the System Volume Information and open it. Here in this folder you will have most of the data that has been deleted manually or accidenlty done or formated.

Using Tools
=========
TESTDISK-6.11.3

Read documenation before starting.

http://www.cgsecurity.org/wiki/TestDisk
donwload

You can also go with the link provided by LeDaouk.
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alfaroAuthor Commented:
I've taken a look at the TESTDISK utility and it can actually see the user account and reports it as around 35gb in size. However, Windows just shows it as a file of a few kb's. Is there anyway to get access to this account "normally", ie. through Windows or am I going to have to recover the data somehow?
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alfaroAuthor Commented:
Running Recover My Files it found all the files I can already access but doesn't find the missing user account at all..
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alfaroAuthor Commented:
Oops, my mistake. When I said it had found 35gb of data it turns out that I was misreading things.. It looks like it has can only see the same 35kb's of data in the user account file. The same as in Windows...

How can I restore Windows using the process you describe? I can access the System Volume Information and in it there are lots of files called RP followed by different numbers. Inside each are various .dll's. How do I go about restoring these?
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alfaroAuthor Commented:
I think I know what you meant regarding the System Volume Information. If you mean copy the backed up registry files into system32\config, I have just tried that and Windows gets as far as the login screen and then stops, as before. This is presumably because the user account no longer exists. This also applies in safe mode when I try to boot into the administrator account..
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bitlaCommented:
Sorry! I made a mistake. Its not SYSTEM VOlume Information. ITs RECYCLER

In RECYCLER you will have the files and data that has been deleted or lost.

Using TestDisk you retrive the files but not accounts.
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bitlaCommented:
Once you backup/retrieve data try System Restore and check whether the accounts and settings are restored.

Regards
Bitla
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alfaroAuthor Commented:
There's nothing in Recycler, probably because the user accounts weren't deleted as such. They just sort of disappeared..

The overall occupied size of the disk is still the same as it was before the user accounts were lost so the data is still there somewhere..
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alfaroAuthor Commented:
Sorry, I meant ErdUndoCache folder, of course...
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bitlaCommented:
Good and all the best, thank you for sharing the info.
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alfaroAuthor Commented:
Good old ErdUndoCache folder...
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