I have a Dell XPS 13 Ultrabook (L322X) running Windows 7. Everything was fine up till a few days ago when Windows Update (for no reason!) decided to install some patches on my machine. When i next restarted, it started applying those Windows patches, and got hung Applying Update XX of XX.  Multiple restarts and reboots didn't help. After trying a few things to resolve i gave up and i decided to perform a fresh Windows 7 install. (i have backups of all my files).

Does anyone have instructions on how to do a fresh install of Windows 7 from a USB drive on Dell XPS 13?