I have discovered this app for Android called Unified Remote, which lets you connect your android phone to your computer and you can control programs, mouse and keyboard . So you can control almost everything on your computer. You can also upgrade it to premium which that will allow you to have more control over your PC.
1) You should first install on the computer you wish to control, go to this link
and download it for your computer.
2) Now you will need to install the application and start it.
3) Now go to this link and download it for android and install this application on your phone, do this 3rd step from your android phone.
4) Once its done, on your android you will only need to follow the instructions
FEATURES OF UNIFIED REMOTE
1.Use your device as a single or multi-touch mouse.
2.Mirror your computer screen to your device.
3.Turn off or wake up your computer.
4.Supports standard,third party,and custom keyboards.
5.Browse, manage, open files and folders.
6.Control your media and much more.