Posted by Jayce Ooi as How to
Install Nexus 4 ADB and Fastboot drivers on PC (Windows XP, Vista, 7 or is so easy with the help of Google Nexus 4 ToolKit. With a few clicks here and there by following the on-screen instructions, Nexus 4 ADB and Fastboot drivers will be installed automatically after connect Nexus 4 to PC.
Download Google Nexus 4 ToolKit and install it. Then you are ready to install Nexus 4 drivers.
Install Nexus 4 drivers on PC
How to install Nexus 4 ADB and Fastboot drivers on Windows XP / Vista / 7 / 8?
You should have Nexus 4 ADB and Fastboot drivers on PC now. Enable Nexus 4 USB debugging mode, then connect it to PC with USB cable. Nexus 4 ADB driver will be installed like below.
ADB Mode (USB Debugging Mode)
Same apply to fastboot driver, just load Nexus 4 Fastboot Mode and connect USB cable to PC. Google Nexus 4 BootLoader Interface driver will be installed.
Back to Google Nexus 4 ToolKit main page, your Nexus 4 serial number will be shown if drivers are installed properly.