Category Archives: Zonder categorie

Windows Photo Viewer: File appears to be damaged, corrupted or is too large

If try to open a JPEG file with a corrupt header in the Windows Photo Viewer it will tell you: “Windows Photo Viewer can’t open this picture because the file appears to be damaged, corrupted or is too large.” This message indicates that at least the header of the JPEG is corrupt. If damage is… Read More »

The corrupt JPEGs that weren’t corrupt

Often I am asked to repair JPEGs that can be opened but don’t display correctly. Many of those look okay for some part, but turn into a grey area at some point. Repairing these files (or recovering them as we’ll see) isn’t always straight forward and sometimes requires some detective work. Half grey photos In… Read More »

Corrupt JPEG Files

First things first, what is repair and what is recovery? Corrupt JPEG file Repair and JPEG File Recovery are often mixed up. Recovery: Meaning getting lost or deleted files back from for example a memory card. Maybe the card itself (the file system) is corrupt or the card was accidentally formatted. Repair: Repair existing JPEG files that… Read More »

List of ransomware decryption tools

As a result of my ransomware research I’m now following a bunch of ‘tweeters’ that work in the field of cyber security. One tweet pointed me at this list of ransomware decryption tools. Seen this list is a big mess, I cleaned it up and make it available here. In the first column the name of… Read More »

Why you’ll never see me buy a WD My Passport

Data recovery from encrypted disks is very hard. Numerous data recovery software developers set up honey pots to draw Google search traffic of people looking for software to recover data from WD My Passport drives. Which is kind of dishonest I think. So, I guess you’ll all know, that using commercially available data recovery software… Read More »

DiskTuna 1.2.3 portable

It has come to my attention that several websites are offering a portable version of DiskTuna. As I was curious I downloaded a few. I advise NOT to download these versions as they seem to be installing unwanted software as well. They are typically offered as .RAR or .ZIP files and are larger than the… Read More »

VSS safe mode, what is it?

DiskTuna VSS Safe-mode DiskTuna features a ‘VSS safe mode’. But that’s just a name that I made up. Many defraggers offer a ‘VSS aware’ or ‘VSS compatible’ option. VSS-aware defragmentation will always make defragmentation and optimization less effective. But what is it? What does it do? What is VSS anyway? Windows Volume Snapshot Service (VSS) VSS… Read More »

Defrag and SSD hard disks and VSS and more

Quite a bit has changed since the inception of DiskTune, for example SSD harddisks are now widely available. Consensus is that defragging a SSD hard disk is unnecessary and even undesired [1]? Hmm, interesting read. Anyway, it would be a good idea for DiskTuna to determine if a volume resides on a conventional hard disk or a… Read More »