|Sounds like the damage is quite extensive so it would be a lot easier to do a factory recovery if it's a factory built PC, or restore from the most recent disk image if you created one.|
Back up all your data first though.
You also need to install a more reliable online security package since what you have now (if any) is obviously weak and no good.
I use Comodo Internet Security and it has never let me down. I've never had any infections, malware, or browser hijacks since I started using Comodo 10 years ago.
message edited by phil22