Doc Extension on Exe Downloads.

I posted this question the other day and have had only one response which did not solve the problem..
When I go to download any EXE file. The download box comes up with the name of the file correctly stated in the name box below in the file type box it says .doc The only option listed is all files. if I proceed with the download the file is named xxxxx.exe.doc and shows up as a wordpad document. I am unable to change the file Extension. Zip files and others seem to download ok. It is only the.exe files. I have checked for Virus and that is all clean.. The only thing I can think of to try is to reload Win Xp over the existing one and see if it clears it. Any help would be greatly appreciated. Win XP with Netscape 7.0

Carol