Error message when you open a new window in Microsoft Dynamics CRM 3.0: "An error has occurred in the script on this page"

When you open a new window in Microsoft Dynamics CRM 3.0, you receive the following error message:

When you click an entity to open a new window, Microsoft Dynamics CRM 3.0 calls a function that determines the window size. For example, Microsoft Dynamics CRM 3.0 calls this function when you open a new window for a note or for a report. This function is generated by the WindowInformation.aspx page. If anonymous access is enabled for this page, Microsoft Dynamics CRM 3.0 fails because Microsoft Dynamics CRM 3.0 expects integrated Windows authentication on all .aspx pages.

To resolve this problem, follow these steps:

1. Click Start, click Run, type inetmgr, and then click OK.
2. Expand the server name, expand Web Sites, expand Microsoft CRM v3.0, expand _common, and then click WindowInformation.
3. Right-click WindowInformation.aspx, and then click Properties.
4. On the File Security tab, click Edit in the Authentication and access control area.
5. Click to clear the Enable anonymous access check box, click to select the Integrated Windows authentication check box, and then click OK two times.