Install Indy 10 on Lazaus
Step 1. Download from http://www.indyproject.org/Sockets/fpc/index.en.aspx  

Step 2. Extract file and open Lazarus IDE

Step 3. Goto components menu and clik submenu "open package file (.lpk)"  so brown to indy 10 directory and select "lazarus\indylaz.lpk"

Step 4. Click Compile Button and Click Install