While your RR Turbo may be slow, it doesn't cause your computer to crash. You probably have problems with your computer that are causing your crash. You may have adware, hijacks, a virus, hardware issues, etc. I guarantee that if I came over and hooked up my laptop to your RR, I would surf all afternoon with no crashes on my computer. May I experience slow surfing? Sure, that is possible. But RR isn't going to cause me to crash.
Have a friend bring a laptop over and test your connection. You'll need to release the MAC address from your modem if you are not using a router by powering it off and back on.