Saturday, April 28, 2012

Regarding My Title Change for the Article Secrets of Word DOCX File Recovery

I recently changed the title and contents of my post on recovering corrupt docx documents.  Before the change I had unwarrantedly generalized the subject to refer to docx, xlsx and pptx files, however I have come to see that Microsoft Office handles file corruption in the three programs differently. So the article is now solely about docx corruption and what to do about it.

Also note, the article is meant to describe how to recover the text and formatting for corrupt docx files. In other articles and elsewhere on the Net I have provided links to my own GUI software, Corrupt DOCX Salvager and Corrupt MS Office 2007/2010 Extractor, as well as the my own and other's command line tools, Command Corrupt OfficeOpen2txt, Silvercoder's DocToText and Sandeep Kumar's docx2txt, which will do a pretty good job of recovering just the text, not the formatting.

Note even though all these text extracting programs work pretty well for recovering text from corrupt docx files, I have come to find they all benefit from passing the files through a good zip repair program first, like InfoZip zip.exe -FF command. A typical command line using zip.exe for repair would be for our purposes here: zip.exe -FF input_file.docx --out input_file_zip_repaired.docx. You don't need to input files with a zip extension or specify that for the output.

Anyway my new open source app, Savvy Corrupt DOCX File Recovery, will automatically repair the zip as a first step and then try to recover the formatting too. If it is unsuccessful with that it goes to a plan B and C to recover just the text, so maybe using the new app, you get the best of both worlds.

Postscript: I now have a docx file where the document.xml and styles.xml file are both corrupt. This causes Savvy DOCX Recovery to choke. Until we fix it, if Savvy DOCX Recovery chokes, try manual recovery and delete all corrupt xml files other than document.xml. You can tell an XML file is corrupt because following the method described in my previous post, when using 7z.exe as the unzipper, the command line results will show "data error" next to the unzipped file.

Wednesday, April 25, 2012

Chk-Back Categorizes ChkDisk Fragments and Adds the Right Extensions - Chris Sampson from  TRC Data Recovery wanted to let my readers know they released a nifty new freeware application called ChkBack which is designed to retrieve data that has been lost after ChkDsk has scanned a drive and relocated file fragments...The problem is chdisk recovers fragments from bad sectors of your disk, but does not add the right file extensions and may bunch several files in one chk file if the sector had more than one file (I think).

More info: "After the program is installed it can be used to analyse chk files to determine their original format. The utility will interrogate each file in the selected directory and test them against a set of common hexadecimal file headers. When a file tests true for a specific file type* a copy is made in a subdirectory it will create called 'ChkBack Results'; the application never makes any changes to the original files.

It can be used to process large numbers of files or set to run slowly to allow users to see what is being tested and the results of the application as they happen."

Advice On How To Uncorrupt JPG Images

From the first comment here: - I don't know what ha14 is suggesting here.  This may replace the image with the JPG preview. Irfanview can be download here:

1) choose the “corrupted” images in the filebrowser
2) go to  File – JPG Lossless Operations – Lossless transformations with selected Thumbs
3)choose: transformation: none, optimize JPG file, save with original date/time andKeep all APP markers."

Saturday, April 21, 2012

How to Bypass or Remove a BIOS Password - "A BIOS password is a protection measure that can be used to stop someone powering up a computer system or making changes in some of the computers most sensitive areas. Many big name computer manufacturers such as Dell and HP lock the customers out of this area because they don’t want the customer changing anything and potentially damaging the machine (which the manufacturer may have to warranty). However, when someone like a computer technician or hardware enthusiast needs to make some hardware changes to the computer, they will need to access the BIOS. Here are some methods to bypass or remove a BIOS password..."

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