If you now double click on a file with no extension it will open with the application selected. To check what an existing application used look at its entry under HKEY_CLASSES_ROOT, e.g. HKEY_CLASSES_ROOT.doc uses Word.Document.8 so if you wanted this as your default editor you would change HKEY_CLASSES_ROOT.(Default) to Word.Document.8.

Dec 14, 2010 · Click Run, type regedit and click OK. Go here: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts scroll down to .txt, (this is Note Pad file extension) Expand .txt and click OpenWithList, On the right side is the list, right click and Delete the ones you do no want Note Pad to open.

Close File Explorer Right click your Desktop and choose New - Text File Change the file extension on that new file from .txt to .exe Confirm the change Right click a .package file, choose open with - Choose another App Check the box marked 'Always use this app to open .package files' - IMPORTANT! Scroll to the bottom and click 'More Apps'

Jul 27, 2017 · Hi, I had a MP4 file in my pc but now it shows it as .NONE when i changed it to mp4 it says the file is corrupted. How can i revert it back without any problem.

Jun 14, 2017 · Here is a working solution to set a file association back to unknown, it looks a long process, but it is fairly simple. Make sure you can see file extensions - In Windows File Explorer, on the View Ribbon check the 'File Name Extensions' box; Close Windows File Explorer; On your Desktop, right click and select 'New' - Text Document

Apr 4, 2019 · For example, if the default icon that's assigned by Windows to a .file is the icon that's normally used for documents in plain TXT format, then the original format of the .file file may be .txt, and after changing the .file extension to .txt, a text editing program like Notepad can be used to open the file.

Nov 4, 2024 · "Excel cannot open the file '*******.xlsx' because the file format or file extension is not valid, Verify that the file has not been corrupted and that the file extension matches the format of the

Feb 16, 2024 · The procedures provided to disable add-in apply to all Office applications. Method 3: Install Office Update. This process is to ensure that you’ll get access to the newest features and benefit from the latest security updates. Please follow the steps below on how to do this accordingly: 1. Open any Office apps. 2. Click on File. 3. Go to ...

Apr 10, 2023 · I found information that can help resolve this issue. Try right-clicking on the file and select properties. Next, click unblock. Method 2: - Click file>options - Click Trust Center>Trust Center Settings - Click Protected View - Uncheck the following boxes; Enable Protected View for Files originating from the Internet.

Aug 20, 2021 · That is not a OneNote file - it's the file extension used by the Notability app available for the mac. I'm not aware of am app for windows that can open it. Your friend would need to export it in a format you can open. --