-TURN OFF your internet connection!
-Shut down antivirus software!
-Delete all files about the old version!

-Run[doNET_4.6.1_install.exe] to Install Net.framework

4.0

1,copy "CARS 2015.R3 " or "Trucks 2015.R3" to your
computer.
2,run main.exe in "CARS 2015.R3" （ if you want to install
truck ,please run main.exe in "Trucks 2015.R3")
-The first run you will see this picture

-Click ok then you will see :

Now you will [ctrl+v] to get machine code to send to service

provier(please don’t send this picture to your seller,send the
code，you must told us now you install car or truck.) ,then wait
the [license.key] file.
-Copy the license.key to the [Cars 2015.R3] fold.
3,run main.exe in "CARS 2015.R3" to activate（if you want to
install truck ,please run main.exe in "Trucks 2015.R3")
- click start
- click yes to save FileActivation on desk
- use the 2015.3 keygen to active FileActivation
- click start again
- click no to open the FileActivation actived
- wait for install complete,enjoy!