I am having an issue that I currently find myself completely at odds with. I have two Canon Cameras, the first is my Rebel EOS T2i. The other is a Rebel EOS T1i.
My Win10 laptop just had a crash recently, which required a Repair of Win10. At the end of it, there was a list of all sorts of 'removed' files, many of which were MS Updates. I Can't verify if, before the crash, everything was fine. I just recently started using the T1i as my 'secondary' camera, meaning I'd use it with lenses I could change quickly while my T2i did the "heavy lifting" with my new Sigma 150-600 lens, so that I didn't have to keep changing the monster lens with smaller lenses while out doing my thing.
Since I just started doing this and Spring is in the air, I've been out taking wildflower photos. So just yesterday I was loading up images from both cameras and then going through them with the included Windows Photo Viewer. As I was going through the images, each image would load up (I am using RAW+JPG) it would take a second or three before all the RAW data was loaded. I see the image get a bit more clear as the data fully loads. (It also doesn't allow me to go to the next image until if fully loads.)
Now, as it loads one of the T1i images, it initially shows me the entire photo. Then as it starts to load all the RAW data, the images truncate to showing ONLY the top left 1/4 of the photo and it turns a fairly bright pink as well. I loaded up a free photo viewer from the MS store (to see if it was the Photo Viewer itself) and get exactly the same result. The initial full images show for about 2-5 seconds before they truncate and turn pinkish.
I then decided to check the images in RawTherapee (which is where I do my Photo Touchup Editing) to see if that would help me sort it out. RawTherapee cannot load ANY of my T1i images, it didn't even give me what the other two did. It just said it couldn't load those images, period.
I am pretty sure that previous versions of Windows did just fine with both cameras (I let my wife use the T1i while I used the T2i for photo walks a few years back, but she's not into the photography thing, so I took it over as my secondary as previously described,) but at the time I was using both cameras in JPG only mode. In September of 2025 I decided to jump in and use RAW on the T2i and while the images take longer and use more memory, they loaded fine as far as that goes. I literally JUST started using the T1i as my secondary and I think these are the first images on that camera that I set to RAW+JPG.
It just so happened that my Win10 Crash occurred before I really got a chance to look at the T1i's RAW+JPG images. This is only mildly annoying as I can just go back to using the single camera method (saving me about six pounds of total weight in camera, batteries and two more lenses), though I have found that the two camera method is really starting to 'gel' for me for speed of using different lenses. The Sigma is a 'monster' that requires me using my tripod and changing out that for smaller lenses is an exercise in patience and dexterity with a single camera setup.
That's the nitty gritty detailed story of what's going on. I am pretty sure that it is the camera at this point, otherwise I feel that the RawTherapee program would have loaded them, truncated or fine. Instead it just said, "No. I can't load that image." While RT can work with JPGs, it takes the .cr2 RAW data when loading up the initial images. I surmise that this boils down to an issue with the T1i's age and software compatibility as it's now considered a 'legacy' device.
I would be very interested to hear any suggestions that lead to a solution or course of action I could take to sort this out satisfactorily. I apologize for the length, though I felt a full and as accurate a description of my issue as possible was worth it.
Thanks! dunniteowl
