“Think point” is a fake antivirus which is currently disabling a number of computers in the Anglesey area. One of the sources appears to be a web site which redirects users to a fake download of Microsoft security essentials.
Users who attempt this are then shown a screen as below.
If you get this far do not press the “Safe start-up” button.
If it is too late you will be presented with the following screen at which point it is difficult for you to regain control of your PC again without a professional antivirus removal service as offered by Anglesey computer solutions