If you have your SharePoint 2010 environment without internet connectivity, you might encounter a few performance issues. The most important among them would be the Document Library upload dialog opening and rendering slowly. This might be very annoying, as you might find this behavior only on IE and not on FireFox or Chrome browsers and you might start thinking, why SP, being an MS product, does not work on IE! This is what you need to do (essentially, telling the browser not to check for any certificates - which can happen only when you are internet connected) · Under Internet Tools Option go to Advanced Tab, · Disable / Uncheck the Publisher’s Certificate revocation