When I try to upload pictures I keep getting this message:

Warning: move_uploaded_file(C:/Inetpub/wwwroot/catalog/images/SDcx.jpg): failed to open stream: Permission denied in C:\Inetpub\wwwroot\catalog\admin\includes\classes\ upload.php on line 94

Warning: move_uploaded_file(): Unable to move 'C:\PHP\uploadtemp\php61.tmp' to 'C:/Inetpub/wwwroot/catalog/images/SDcx.jpg' in C:\Inetpub\wwwroot\catalog\admin\includes\classes\ upload.php on line 94

I'm using IIS and I know it might have to do with that I need to change some files to 777. The thing is I don't know how to do that, when I have my server on my own computer. Anyone?

Thanks...