Can't write to any WinXP directories

Hi all,

I'm using a self-compiled XEmacs, and this self-compiled XEmacs 
subsequently cannot write to my Desktop directory (~/Desktop). Therefore I 
checked my desktop folder property, and found out that's marked 
"Read-only", and eventually I found most of the directories in XP are 
marked "Read-only". I tried unchecked the "Read-only" box in the property 
window, but then I found out that I can't successfully change the property

I was thinking that is a problem of my WinXP, however, when I tried using 
notepad or Vim to write new files to these directories, they all succeeded 
doing so

Then, I think that "write-protection" phenomena that exist only to my 
XEmacs may posssibly be due to some tricks that I haven't done in the 
window registry, so that those registry entries may allow some 
applications (such as notepad.exe or vim) to write on these "read-only" 
directories

Can somebody give me a clue on solving this problem?

Regards,

 	Tsunhin