I have SharePoint 2007 SP2 and my client is a Windows 7 machine with IE9 and Office 2010. When I try to open any list using the option "Open with Windows Explorer", I get the message "Your client does not support opening this list with Windows Explorer". I have discovered that if I stop and start the Webclient Service, the feature will work...for a few times, then again I will have to repeat the process. Any ideas? thank you!