I am trying to install Windows 7 fresh copy on my Dell XPS 13L321X but when i proceed to install windows 7, the USB 3.0 driver error appears every time. I have formatted the previous windows 7 from my laptop and i am in a big mess now. I also have tried all possible ways to resolve this issue but the problem is still there.
Please Help me!!!! This problem is now driving me crazy
You really should consider Windows 10, given that 7 is now four months beyond its end of life.
That said, you must use the USB 2.0 port to install Windows if you're using a flash drive. This system uses an add-on USB 3.0 controller - you cannot use it to install Windows.
Once Windows is installed, install the chipset driver and any system software needed. Then patch Windows fully and finally install the USB 3.0 driver.
You need to update the Windows 7 Installation Media to add USB 3.0 drivers, Storage Controllers and Updates:
That being said, Windows 7 has Reached End of Life and the Activation Mechanisms underlying the Free Upgrade from Windows 7 to Windows 10 still work: