Prevent second time installation of set up in same system

Step 1 : Build a server application or service or component and host it on a server. This component will return server datetime

Step 2 : While installing or starting the application for first time call this erver component and get the date time on server. Encode it and store in in the registry

Step 3: Whenever user is starting the application fetch the server time using server component and compare it with the time you have stored in the registry. You may need to decvode the value from registry and compare 

hi you are write

 

Store your information in registry   when install your app with date time and others.

 

When install check this informations. If present in registry prevent installation 

The user who will use trial version software,why they will go to format the sysytem,just what i need,once software trial period gets expired,user can't use the sofware.

 

According to me,it might possible user will unistall the software and use it for certain days. 

1 -The best way that format and install.

 

2- First uninstall ,Clear cookies and histry from bignig and Clear the registry regarding the software