Step 1: right click on "USBasp (tree item)" in "Device Manager"

Step 2: (‎8/‎18/‎2014 1:56:47 PM) left click on "Properties (menu item)"

Step 3: (‎8/‎18/‎2014 1:56:50 PM) left click on "Update Driver... (button)" in "USBasp Properties"

Step 4: left click on "Browse my computer for driver software (button)" in "Update Driver Software - USBasp"

Step 5: left click on "Browse... (button)" and show the path where you have downloaded the driver

Step 6: Chose the latest driver as shown

Step 7: click on "Next (button)" in "Update Driver Software - USBasp"

Step 8: left click on "Install this driver software anyway (button)" in "Windows Security"

Step 9: click on "Close (button)" in "Update Driver Software - USBasp"