Thank You for your reply and Sorry for my delay. I was not in a position to attend to it.
The files are not shared. Now I believe that this is a virus. Possibly a Macro, because all these files' names are starting with identical words and because I believe my E-Mail Account was compromised. If I use these words to name a New File. The same thing
happens and the new file is also read only!! When I save these files I must use another names. Then these newly saved files normal (read&write). This is exactly what I did. I saved them all under another names, then, I deleted them all and closed this E-Mail
Account.
However, I still have this (Virus/ Macro or whatsoever) in my computer. I do not know how to get rid of it. I'm just not naming new files using the same words.
Can anyone help me getting rid of it?