SharePoint Windows Explorer Mode Not Working
By: Matt Takhar | Comments | Related: > SharePoint Administration
Problem
The "Open with Windows Explorer" option on a document library does not open Windows Explorer.
Solution
One of the really cool features on a SharePoint document library is the ability to open the library with Windows Explorer. This allows users to easily drag and drop files from a network share or local drive straight into SharePoint.

This shows the "Open with Windows Explorer" menu option on a Document Library.

Here is the Windows Explorer window accessing a SharePoint Document Library.
However, if you are using Internet Explorer 8 (64 bit), clicking the link from the Actions menu simply appears to do nothing. The solution unfortunately is to use a 32 bit machine until Microsoft adds support and an upgrade for Internet Explorer (64 bit) to a Level 1 supported browser.
UPDATE: Microsoft has addressed this issue with the latest Internet Explorer Cumulative Security Update. LB97445 http://support.microsoft.com/kb/974455 Also note this article from www.ie8blog.com which refers to the same issue.
In SharePoint 2010 you do get a warning message stating your browser does not support this command which is a small step forward.

A list of supported functionality across the top browsers for SharePoint 2010 can be found here: http://technet.microsoft.com/en-us/library/cc288142.aspx
For those of you new to SharePoint 2010 the "Open with Windows Explorer" option has moved to a small icon in the ribbon.

Version Information
This issue has been recreated against the following environment:
Environment 1
- Server: Windows Server 2008 R2 - x64
- Client: Windows 7 - x64, Internet Explorer 8
- SharePoint: Microsoft SharePoint Server 2010, Mcirosoft Office SharePoint Server 2007 SP2, Windows SharePoint Services 3.0 SP2
Next Steps
- Read these Microsoft Knowledge Base Articles, KB972584, KB974455 (Fix for issue)