Restore Default File Type Associations in Windows 10  

edsager said:

Brink,

I cannot thank you enough.

I will post back my level of success after using these.

Again, thank you,
edsager

I forgot to reply back.

It worked!

Thank you again for your assistance,
edsager

I changed the default browser from Edge to Opera and then I I imported "http.reg" and "url.reg". It didn't work. Default browser remains Opera. How do I change HTM, HTML, URL, etc., file association by using only registry in Windows 10?

Brink said:

Hello razinal, and welcome to Ten Forums. :)

In that case, you could also do a system restore using a restore point dated before this happened to quickly fix it.

System Restore Windows 10

yeah..., I couldn't do that because apparently System Restore wasn't ON until now . But I turned it ON from now on.
anyhow my problem is solved but thanks anyway.

Brink said:

Great news. Did the .reg file for CMD kick in for you?

That's right,I searched for '.cmd' in registry, found and deleted "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\Roaming\OpenWith\FileExts\.cmd" and everything returned to normal.
how about adding the action of removing "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\Roaming\OpenWith\FileExts\.cmd\UserChoice" to your .reg file