Click Start, click Run, type regedit, and then click OK. Locate and then click the following registry subkey:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings . On the Edit menu, click New, and then click DWORD Value. Now u type DisablePasswordCaching to name the new registry entry, and then press ENTER. Right-click DisablePasswordCaching, and then click Modify. type 1 in the Value data box, and then click OK.
