Hi Bernardo.

It all has to do with "run as administrator". Right click on notepad and select "run as administrator", then open the file you want to modify and when you are done, save it.

I'm using Windows 7 Professional and most of my programs are actually installed on different drive than the "C:" drive and so I don't have this problem. In fact, I find I'm rarely running a program or opening a file using "run as administrator" AND I can edit or modify to my hearts content without worry!

Hope this helps.

Mark