When you open a Web site by using Basic authentication in
Microsoft Expression Web on a computer that is running Windows Vista, you may
receive the following error message.
The folder name is not valid.
Serious problems might occur if you modify the registry
incorrectly by using Registry Editor or by using another method. These problems
might require that you reinstall the operating system. Microsoft cannot
guarantee that these problems can be solved. Modify the registry at your own
To work around this issue, follow these steps:
- Click Start, type
regedit in the Start Search box, and
then click regedit in the Programs
- Locate and then right-click the following registry subkey:
- Point to New, and then click DWORD
- In the right pane, type
BasicAuthLevel to name the new registry entry, and then
- On the Edit menu, click
- In the Value data box, type
2, and then click OK.
Note The mapping is as follows:
- 0 - Basic authentication disabled
- 1 - Basic authentication enabled for Secure Sockets
Layer (SSL) shares only
- 2 or greater - Basic authentication enabled for SSL
shares and for non-SSL shares
- Restart the computer.
Basic authentication is
one form of user authentication where a user is identified to the server.
When the server is configured to use Basic authentication, the client
computer transmits the users' credentials to the server. If the channel is not
encrypted, such as in typical HTTP traffic, a malicious user on another
computer on the network can possibly intercept the user name and the password of
By default, Basic authentication is disabled in
Windows Vista. When Basic authentication is disabled,
either the client computer uses a different authentication method (if the
server supports a different authentication method), or the request fails.