How to Install apks from computer directly.[for all android devices]

1. Go to Setting of your android device
2. then,Application
3. then,Development
4. make sure that USB debugging is connected ie clicked.
5. Connect your device to computer
6. now you just need to download small application in your computer
7. here goes the link http://www.mediafire.com/?os4q4lhdnp9tgex
8.  open the application
9. drag the downloaded apks to marked area of below fig.
11.  
12. This image is captured after successfull installation of apk to my device. 
13. Have fun guys.