so, restart = IP ban now?
It's PC related, there is no reason why an IP ban would make your computer restart.
It could be a hack related problem.
Something wrong with your combat arms.
Some program interfering with combat arms making your PC restart as a solution so nothing will go wrong with your computer *A.K.A BSOD*
Try ending some processes that you don't think you need in your task manager.....
Ctrl+Alt+del > Processes > End Process.
Since your not really well educated with the computer seeing as you thought an IP ban can restart your computer, I don't recommend this for you because you might not know what your closing lol.