Computer infected with CryptoWall 2.0 - Can anybody help?

Hello,

Computer: Hp Pavilion dm4 OS: Windows 7 premium 64 bit

Computer is infected with CryptoWall 2.0. I have Avast premium. I have opened computer in safe mode with networking and ran full Avast scan, and also boot time scan. Moves virus to chest however computer still infected. Have also downloaded HitMan Pro in safe mode with networking and run the scan does not identify the virus.

Can anybody help?

Thank you!

https://forum.avast.com/index.php?topic=53253.0