File associations no longer work properly on Windows 10 after a buggy update. Windows won’t let you select certain applications as your defaults. We tested multiple PCs running the stable version of Windows 10, and they all had this problem.
Update: Microsoft has confirmed this bug exists. Microsoft says it “is working on a resolution and estimates a solution will be available in late November 2018.”
This is a strange bug. It affects some applications, but not others. For example, Windows 10 won’t let you make Adobe Photoshop or Notepad++ a default application for images or text files. But you can make other applications, like IrfanView, VLC, or Google Chrome, your defaults.
For example, here’s what happens when we try setting Notepad++ as our default application for .txt files in Windows 10’s Settings app. Windows just ignores our choice and chooses Notepad as the default.
The same problem occurs when we try choosing a new file association by right-clicking a file and using the “Open With” context menu. After picking Notepad++ and selecting “Always Use This App,” the file opens correctly in the application we chose.
However, the next time we open that file, it opens in Notepad rather than Notepad++. Windows just forgets our chosen file association.
Again, we’ve tested multiple Windows 10 PCs running the April 2018 Update and every single one we tested has this problem. It doesn’t affect every application, but it does at least affect Photoshop and Notepad++. This bug does not appear to affect PCs running the October 2018 Update, which was pulled because of multiple data loss bugs and has not yet been re-released. (Update: Microsoft says this bug does affect some PCs running the October 2018 Update.)
Based on our research and various social media posts we’ve found, our theory is that this stopped working properly when Microsoft released the KB4462919 update on October 9. But we really don’t know. It’s broken on the stable version of Windows 10 today and it’s probably been broken for a while. This definitely used to work!
Update: If you’re experiencing this problem, here’s a PowerShell script that may help fix it. This is a complex solution intended primarily for IT administrators. (Thanks to Woody Leonhard for pointing this out.)
Windows 10 seems like it’s getting buggier and buggier. Why doesn’t Microsoft test things like this before releasing updates?
Image Credit: RealVector/Shutterstock.com.
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