There are so many easy ways to find out whether your computer has been compromised or not.  The following are Microsoft tools that you can use.

Command Prompt

To open command prompt on windows 8 and 10, you can simateniously press windows keys and R on your keyboard. On the pop up that will appear you can type cmd.


Once the command prompt window appear type netstat -r, then from there you will see all the IP addresses of the computers that has tried to connect to your computer and of those that are still connected.

Task Manager

To open task manager you simple need to right click your taskbar then select task manage. On the task manger window select the process tab then on the bottom of the task manager  look for CPU usage pane