That lockout is a malware, and paying the bad guys won't help you. It will run for a while but it can return.
You need to clean the malware out of the PC. If you can get into safe mode with networking (press F8 on bootup, select that from the options shown) download malwarebytes and/or combofix and attempt to remove the malware. If that fails you may need to re-install windows.
DON'T PAY THE BAD GUYS!!!