Resetting IIS
a. From the Start menu, choose All Programs, and then choose Accessories. b. Right-click Command Prompt, and then choose Run as administrator.
At the command prompt, type the following command to change to the Microsoft.NET\Framework64\v4.0.30319 folder, and then press Enter.
cd\Windows\Microsoft.NET\Framework64\v4.0.30319
At the command prompt, type the following command, and then press Enter.
aspnet_regiis.exe -iru
At the command prompt, type the following command, and then press Enter. iisreset