Our friend the National Police Service Virus/Ransomware seems to have mutated, and removing it using the usual removal option listed below, seems to fail.
http://www.f-secure.com/en/web/labs_global/removal/removing-ransomware
One successful way of dealing with it is to use Kaspersky Rescue Disk 10 (https://support.kaspersky.com/4131) as running Malwarebytes or F-Secure in Safe mode fails to work, there is no changes to the registry or the Start-up folders do not have the .ink files in there. Probably the best prevention technique for virsus is to run the systems in non administrative mode, preventing rouge installs of viruses.