Bootcamp crashing after driver download

Recently I downloaded windows onto my iMac and everything went well and I was able to launch everything. This was until I realized I didn't have any sound. I found that I had to download the Bootcamp drivers. I did exactly this and the sound began working. About 30 seconds later it crashed and every time I relaunch it just freezes and then crashes. I was able to restore it to the point before I downloaded drivers and it began working. I then proceeded to download the drivers once again and the error happened again. I assume this problem is due to an error with the drivers. Has anyone had similar problems? Were there any fixes?