CHIRP

When i will program my Baofeng UV-5R with chirp it goes fine with cloning to the computer. I make the changes i want to and when i click clone to radio, the process stops in about 50%. When i click cancel chirp wont respond, i close the cloning process window and tries to reconnect the radio it wont allow me access. i disconnect the radio, turn it off and then reconnect to cumputer and turn it on, the computer wont find it. if i unplug the USB programming cabel the computer gets blue screen of death.
I have tried to reinstall chirp, reset the radio and reinstall the driver for the cabel. Nothing works, it does exactly the same thing.
Any ideas?