As I wrote in a previous article, popups can cause the CRM web client to not display at all, due to the nature of CRM web application startup mechanism.

Most of today's popup blockers require you to naviate to a site in order to add it to the blocker's "safe" list.  This is more than a little difficult of the browser window disappears the moment it is displayed.

To circumvent this issue, all you need to do is navigate to the following URL:

http://[crm server]/loader.aspx

Note: Replace [crm server] with the address of your CRM server.

This will load the CRM web applications main page in a normal browser window. Once displayed, you can click on whatever menu or button you popup blocker has to add the site to the "safe" sites list.

Starting CRM normally should work at this point.