Hello, For each day I regret more and more to have purchased and installed Vista Ultimate 64 Bits. I'm along one week trying to use the WebDisk (WebDav) available on webhosting company that uses cPanel (Control Panel). I've applied so many patches trying to fix this issue, like this: http://www.microsoft.com/downloads/details.aspx?familyid=17C36612-632E-4C04-9382-987622ED1D64&displaylang=en And there is no SOLUTION. I read a thousand of articles and a lot of people have this same problem. There is a discussion about this on: http://social.answers.microsoft.com/Forums/en-US/vistanetworking/thread/d81d3eaf-397a-4328-9b48-6697152ee6b8 A little fast search on Google about this issue will show a lot of people passing from this same problem: http://www.google.com.br/search?q=webdisk+vista64+problem Sorry for this post, but I'm completely angry for NO FOUND A SOLUTION.