Unassociate a program with extension

[sayanb06]

Whenever I find a .dat, it's associated with Corel WordPerfect and I want to remove that. Please help me do that.

 

[x BlueRobot]

How to Unassociate File Types and Remove File Extension Associations in Windows Vista « My Digital Life

I know the article is for Windows Vista, but Windows 7 and Vista are very similar to each other.

 

[aakshat]

I also have the same problem with .jar format it always opens with notepad.
It seems that the solution you have given is not working for me.
When i type the command and press enter nothing happened.

 

[x BlueRobot]

Have you tried right-clicking the file (Properties) and then changing the type of program it opens with?

Will upload a screenshot

Using my step-brothers computer, I'm sorry for any stupid files I use as examples

 

[x BlueRobot]

Found two tutorials on the forums which may be use to both of you:

http://www.sevenforums.com/tutorials/178296-file-extension-type-unassociate.html
http://www.sevenforums.com/tutorials/12196-open-change-default-program.html

Hope this helps,

Harry

P.S. Sorry if I am not being of much help

 

[aakshat]

OK that's pretty fair. but i want to make it completely free.
i mean i don't want .jar format to associate with any program.

Do you know some other way to do it.?
Have you tried it? is it working for you?:sarc:

 

[aakshat]

Ok let me try and tell you.

No dude atleast you are trying and that's enough for me.

 

[aakshat]

The first link supposed to work for me but it dint
Unfortunately the program Shawn suggested don't have the .jar format.
Hope it help sayanb06.
Anyway thanks x BlueRobot for trying.

 

[bobafetthotmail]

what about making a copy of some random exe (say make a self-extracting archive and leave it on the desktop or use some portable program you have around, or copy an exe from some program you have, does not matter), then you tell the computer to open the file with that, then delete the random exe?

Works if I do it with a jpeg on my machine. after I deleted the thing, the "what you want to open this with?" window appears when I try to open the jpeg.

 

[x BlueRobot]

The first link supposed to work for me but it dint
Unfortunately the program Shawn suggested don't have the .jar format.
Hope it help sayanb06.
Anyway thanks x BlueRobot for trying.

No problem, sorry couldn't help any further, maybe as .jar is a combination of Java class files (or is it .java source files? cant' remember) and not a individual file is the reason why a file extension couldn't be found within the program.

 

[aakshat]

Hum. i also thought that.
anyways i am not much worry about it as long as it is not gona come in my way.
and i am not going back to work with java again (as photoshop is the new frend).
So who cares about a single file extantion which you have nothing to do with.
Again thanx for your efforts

 

[bobafetthotmail]

did you see my post here? What I did works for me.

 

[Alejandro85]

The easiest way is by directly editing the file associations in the registry. Open an elevated regedit, go to HKEY_CLASSES_ROOT\.jar (the last key is a point plus the extension) and delete it. It completely blows up the association and makes the file type unknown again.
You may need to restart explorer/log off/reboot to see the change.

An alternative way is to use some program to edit the file associations for you. A good option is FileTypesMan - Alternative to 'File Types' manager of Windows

Unfortunately, the screen for touching associations in a nicer way was removed in Vista, so you have to do workarounds.