You receive an "Error reading IIS default vroot info" error message when you use Internet Services Manager to Internet Information Services (IIS)

If you use the Internet Services Manager to manage your Microsoft Internet Information Server (IIS)-based computer, you may receive the following error message:

The virtual servers may be running at an isolation level other than the default for your version of IIS.

To resolve this issue, you must configure each virtual server to use the default isolation settings for your version of IIS.

In IIS 4.0, the default isolation setting is Low, also known as running in separate memory space (isolated process). In IIS 5.0, the default isolation setting (also known as Application Protection), is Medium.

To set the isolation setting to Low in IIS 4.0, follow these steps:

1. Click Start, click Programs, click Windows NT 4.0 Option Pack, click Microsoft Internet Information Server, and then click Internet Service Manager.
2. In the management console, double-click the Internet Information Server folder, and then double-click the computer node.
3. Right-click the Default Web Site, and then click Properties.
4. Click the Home Directory tab.
5. Click to clear the Run in separate memory space (isolated process) check box, and then click OK.
6. Repeat steps 3 through 5 for each Web site that is configured.
7. Close the Internet Information Services management console.

To set the Application Protection setting to Medium in IIS 5.0, follow these steps:

1. Click Start, click Programs, click Administrative Tools, and then click Internet Services Manager.
2. In the Internet Information Services management console, double-click the computer node.
3. Right-click the Default Web Site, and then click Properties.
4. Click the Home Directory tab.
5. In the Application Protection item list, click Medium (Pooled), and then click OK.
6. Repeat steps 3 through 5 for each Web site that is configured.
7. Close the Internet Information Services management console.

For more information about how to configure default properties for Internet Information Services, see the IIS documentation. To view the documentation, start Microsoft Internet Explorer, and then type the following URL in the Address bar: http://localhost/iisHelp/iis/misc/default.asp (http://localhost/iisHelp/iis/misc/default.asp)