Configure Permissions for the ASPNET User

Using the Windows Explorer, navigate to the <drive>:\InetPub\wwwroot\NorthwindTrader\Pipelines folder, right-click the log folder, and then click Properties.
In the log Properties dialog box, in the Security tab, click Add.
In the Select Users, Computers, or Groups dialog box, do the following:

Use this To do this

Look in Select your computer name from the drop-down list.

Name Select the ASPNET from the list.
Click Add, and then click OK.
In the log Properties dialog box, in the Security tab, grant the ASPNET user Full Control, and then click OK.

Use this	To do this
Look in	Select your computer name from the drop-down list.
Name	Select the ASPNET from the list.

Additional resources