Dreamweaver 8 (Help)

Hi,
When I install Dreamweaver 8, the following files are copied here:
"C:\Windows\Downloaded Installations\Macromedia Dreamweaver 8". If I cancel
the install process and I run it again, it says me, that, if I want to
overwrite the file what are into this folder: "C:\Windows\Downloaded
Installations\Macromedia Dreamweaver 8" (DW_Client_Installer.exe,
english.pfw, Macromedia_Dreamweaver_8 and WindowsInstaller-KB884016-v2-x86).

Why my windows OS is making that files into that folder and why ask me if I
want to overwrite the files when I try to install it.
I did it, but i have the above questions...

The same thing happens with Flash8.
Thank You.