Virtualbox reboots on and on and on. To solve, do following:
If you are seeing this problem repeatedly you can manually disable these drivers (with no negative side effect) by going to the following location in the registry:
And changing the ‘Start’ value to ‘4’.
Next is to disable the network card and then choose it in NAT mode. After a restart, visit network connections and enable the card there. This should now solve the problem for good.