Authentication Prompt error fix

SharePoint Web Application with Host Headers : Loopback Authentication Prompt fix

In case if you used Host Headers in your SharePoint Web Application create the system may Loopback prompt for Authentication to fix this issue?

Click Start, click Run, type regedit, and then click OK.

In Registry Editor, locate and then click the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa

Right-click Lsa, point to New, and then click DWORD Value.

Type DisableLoopbackCheck, and then press ENTER.

Right-click DisableLoopbackCheck, and then click Modify.

In the Value data box, type 1, and then click OK.

Quit Registry Editor, and then restart your computer.