files blocked if html or htm

[Guest dtontsch]

I have Vista Busniess and am domain and computer administrator an this laptop.

I have some file located e.g. in D:\Folder\Folder2\file.txt which I can

easily edit, rename etc... I have full control of this file. Once I close the

file, rename into file.html and open it then with an editor I can't save

changes anymore, it says like "File/Device may be read only or open for write

by another application". Neither if this is true. Renaming the file back to

file.txt allows me to change contetn again, also I can rename the file.html

into file1.html, this is possible, just editing the content is not

allowed.This is true for any html file not just for one.

I have to mention that UAC is turned of on this PC.

 

Kind regards,

Dieter