Why i am unable to rename file ?

[mkmkmk]

Whenever i m trying to rename file i m getting following message......

if you change file name extension,file may become unusable.

link....

[Ron]

hey buddy......
You can change the file name but u hv to chnge the settings............

Method1
1.Go to Tools>Folder Options>View tab
2.In the View Tab Option.....
Check The Option
Hide Extensions For Know File Type.........
3.Apply it and change the file Name............

Method2
If u dont want to change the settings then .........
1.Rename The File with given way
.............................
FileName.Extension
......................
For Example
Tochange the file name Ron.doc to 1991.doc
thenRename it as 1991.doc

[mkmkmk]

Thanks Ron, method 1 worked perfectly......thanku very much .....

[redhat]

^^^
But the second method is what u should be using.
I personally prefer that method, with the file extentions showing, because type conversion, sometimes helps in opening files