Andy we had to deal with the same virus. After we reformatted the hard drive and got it working again an IT friend suggested 2 things.
1. download and run the free version of Malwarebytes (works great) http://www.malwarebytes.org/ Even when you have the blue screen of death and open in safe mode this little guy will get the computer up and running again. This is the only one that i have found that works.
2. download and run the free version of CCCleaner (works great) http://www.piriform.com/ccleaner This one when ran once a week will keep your computer clean and running fast.
I loaded and ran these both on an old laptop and bang, it's working fine again. Now these two are on all of our computers.