I moved this to Malware Discussions > Top Threats as there are similar cases here. Look for FBI Moneypak.
The first thing to try is System Restore to before all this started. See the last link in my signature for methods.
Method Two here might be possible: http://www.vistax64.com/tutorials/76905-system-restore-how.html
If successful then turn off System Restore temporarily to erase the infected restore point.
I was thinking that you could use a USB Flash Drive to port over the installer files for Stinger and Malwarebytes Free, both linked in my signature below, again the last link.
Note: you will probably have to rename the files to camouflage them from the malware or it will most likely prevent their installation.
Also note that Malwarebytes Free can be run in Safe Mode and can even be updated in Safe Mode with Networking.