I have this two following problems when i try to install nopCommerce localy
1st: The IIS APPPOOL\ASP.NET v4.0 account is not granted with Modify permission on folder C:\inetpub\wwwroot\nopCommerce2\. Although this is not an error, it's highly recommended that you configure these permissions.
2nd: The installer couldn't update the ConnectionStrings.config file on your server. This may be caused by limited file system permissions. Please open your ConnectionStrings.config file manually in Notepad and add the following line inside the <connectionStrings></connectionStrings>:
<add name="NopSqlConnection" connectionString="Data Source=TAKIS-PC\SQLEXPRESS;Initial Catalog=wrc;Integrated Security=False;Persist Security Info=False;User ID=sa;Password=12345;Connect Timeout=120"/>
for the first "acount is not granted" i use windows authedication
for the second i tried to do what it said but it was the same...