Windows 10: video files / class not registered in Windows 11, 64 bit

HP desktop, Windows 11 / 64bit. After an attempt to install an older version of Photoshop it didn't successfully installed, no exe file the system froze after restart, so I had to start from a "safe" made, then repair, restore and somehow the system started. There's no option I could find to uninstall that Photoshop program as it isn't listed as an installed one, but I can see its folder. Of all complications I noticed so far is the issue with some files that can't be open due to class not registered. I managed to restore functioning of image files, but can't restore video files operation. I

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"class not registered" error

Hi Eddie,

For better assistance, are you getting the error with this specific file only?

We suggest checking this thread to resolve the "Class not Registered"
error.

We're looking forward to your reply.

 

I can't open my video files. i keep getting " Class not registered"

Hi Wilson,



It's possible that some system files got corrupted, causing the "Class not registered error that you're getting whenever you try opening video files. We'd like to learn more about your concern so that we could provide the proper resolution. We
just have a few questions for you:

• 
  Which version of Windows 10 is on your computer? To check, click
  Start, type winver, and press Enter.
  
• 
  Which application are you using when you open videos?
  
• 
  Does this happen only to specific video file types, like MKV, or all video file types?
  
• 
  Did you make any changes to your computer before this started happening?
  
• 
  What troubleshooting steps have you tried so far?
  

 

"Class Not Registered" Windows 10 when trying to open jpg

Hi Teresa,

The error “class not registered” may occur if there are any Windows files are not properly registered, damaged, missing in Windows.
To better isolate your concern, we'd like to gather more information:

• Have you made any recent changes before this issue occur?
• Does this happen only to .jpg files?

Meanwhile, we suggest that you follow the steps in this
article. It will let you also scan for corruptions and provide remedy.

Keep us posted if you need additional help.