Is your system fully compatible with the new driver?
https://avid.secure.force.com/pkb/ar...n-Rack-Drivers
Try uninstalling everything.
Head back into Device Manager and Show Hidden Items, and make sure all Eleven Rack entries are gone.
Try running Ccleaner, run the Registry Cleaner too.
Restart the computer with the 11R OFF.
Install driver.
Restart computer.
Plugin/turn on 11R.
Doesn't work - try another USB port.
If that doesn't work, you may have an incompatible system, or you may need to update some drivers or BIOS of your motherboard.