We are very sorry to hear of this problem. To rectify this as quickly as possible, you need to first run an FSDIAG on your PC. Here are instructions on how to do it: click here
Once you have done this, contact our customer services via this webform, so that you can attach the FSDIAG to it. Here's the webform: click here you would prefer, our number is 0870 0130 794, but you'll still need to run the FSDIAG before calling.
Alternatively, you can check our community for help: click here
Once again, we are sorry for the inconvenience this has caused you.
F-Secure UK Team