SharePoint 2010 integrates with Microsoft SharePoint Workspace 2010 to provide offline access to SharePoint resources. This functionality however causes users to receive an ActiveX message when browsing through the site. For internet sites I’ve found it helpful to disable offline functionality so users don’t receive this prompt.
Offline client availability settings are configured on each site. To disable, browse to Site Settings and click Search and Offline Availability.
Change the Offline Client Availability setting to No.
Happy designing,