DON'T FORMAT. Jeesus!
This particular virus is quite nasty to those without the knowledge.
Simply use another computer to go to Surfright.nl and download HitmanPro (Choose the correct bitrate for your Operating System) then once loaded, click the little man at the bottom of the program. It'll mention a Kickstart.
Kickstarter is a feature of HitmanPro that can kick every other unknown process out (Including the Met Police ransomware) and allow the user to perform a scan.
Once you've clicked the man, you'll be prompted to insert a USB stick. Do so. Once your stick shows up, click on it and then click next. This will 'burn' the program onto the stick. Only takes a few seconds.
Once that's done, leave the stick in and turn off the computer. Turn it back on again then boot via the USB stick (Most computers have an F12 boot key - if not, press F2 or Delete to enter the BIOS and change the boot priority order so that the USB drive is at the top)
Once that's done, you'll be presented with a black screen with white text on. Mentioning about Hitman Pro and Kickstarter. It'll ask you for two options. Press the 1 on the keyboard and the computer will appear to start normally. Let it run through it's entire process until HitmanPro forces itself to run.
Once HitmanPro is on, follow the onscreen instructions to proceed to scanning. Scans usually take about 15 minutes on an average computer.
Once the scan is complete, marvel at the fact that HMP has found the virus and then click next.
Then Activate your free 30 day license, click next and wait for all the entries to be removed.
After that's done, it'll ask you to restart the computer. Do it.
Enjoy your computer once more and more importantly, enjoy your data as it's still there.