|If you haven't damaged anything hardware-wise by plugging/unplugging your laptop carelessly, you should not worry.If you cannot even get into BIOS, that you should worry.|
Windows restarting automatically is one thing. That means your laptop developed a problem that needs a restart. But the problem is there and restart loop is repeated. You can stop your laptop automatically restarting.
Assuming you have not developed hardware fault, after BIOS screen ( this screen may go fast enough so you do not see anything ), you should press and release repeteadly F8 key. This should bring up the Advanced Startup Options screen where you can choose Safe Mode, disable Automatically Restart option, etc.
If you disable Automatically Restart option, next time you restart, you will be able to see the failure message. You post the message and people on this forum will look up the message and give you directions.
If you choose Safe Mode, you may be able to boot into Windows and save your important work before you attempt to repair the problem.