[1st Gen] kindle recognize problem

hello

I try my kindle fire root with Kindle Fire Utility and frieze during the installation process and now windows 7 does not recognize the device when connected.

seems that the kindle's driver is corrupted.

As I can do to make the operating system recognize it again?

Thanks

 

Thanks for your help

The problem is that i can't see the device in windows.

When i connected it, nothing happens.

There is another way to reinstalling driver??

 

Nothing at all.

I tried with other laptops.

I use the cable with others device.

 

I can turn it on, but the boot isn't normally. The screen flashing with Kindle Fire note.