Shut down and restart in safe mode (tap F8 repeatedly during startup to get black and white safe mode screen). Click repair system and then open system restore. Choose a restore point prior to the infection. I picked one from 2 days ago. This stopped the pop ups. Then I got onto the web and downloaded anti-malware (the free version) from malwarebytes.org. The full scan took an hour and found 2 infections - a trojan and spyware. Her computer is now fine.
A possibly easier approach you could try would be to open task manager and look for the program and stop it and then run or get anti-malware. If the virus wont let you open taskmanager, you can find it in C:programs, rename it and then open it.