My laptop windows7 reinstall, after I don't know the caps lock and num luck are on or off. Before the reinstallation the caps lock on or off time the sign displayed in my screen right bottom. How to activate this?

What make and model of laptop do you have as there may well be a specific driver you need for the keyboard..

It appears that when you reinstalled you did not install the driver or software that runs those system lights although most are included by default. Best thing to do is go to manufacturer website and choose your model and operating system and just look through the drivers until you find one that sounds like it handles that function.