Restore Default File Type Associations in Windows 10  

"Brink is it possible to add etl to the table of file types"

Brink said:

Hello @KingSol, and welcome to Ten Forums. :)

.etl files are not associated with an app by default in Windows 10. If you like, you could download and merge the .reg file below to unassociate .etl files to help.

Unassociate_etl.reg

"Brink thanks for getting back to me. I am aware that etl files are not associated with any app. I accidentily associated an app. I now want to disassociate that app."

Brink said:

That's ok. The .reg file I posted above will do that for you. :)

"Thanks Brink for getting back to me. I will have to do a reg backup first. Then I will have to right click the .reg file and copy it to the desktop. then I will double click the file on the desktop to do the merge? Is that correct? The other question I have, will a system restore point be taken before the merge?"

"Thanks for getting back to me Brink. I will definitely let you know how I make out."

Brink said:

"The file type for Windows Update Logs (C:\windows\logs\WindowsUpdate is .etl. I accidentally associated this particular file type with another app. After some research I discovered this tutorial (8703) that discusses default file type associations and how to restore them to their default values in Windows 10. The etl file type was missing from the table in this tutorial. Shawn Brink was kind enough to post a .reg file that would restore the etl file type to its' default Windows 10 value. This morning I created a system restore point prior to doing the merge of the .reg file that Shawn sent me. The merge was successful. Thanks Shawn! "