Anti Virus Pro Removal

I got a nasty virus on my comuter last night and it will not let me open any exe. files or the internet, rendering my computer useless. It seems to be a common problem but I cant find any solutions. I have looked at the other posts by members and there is suggested links but I dont know if it is safe to download them. Is there any way to remove this if so how? Please help me soon.

Please download the current version of HijackThis from HERE

• Double click and run the installer.
  
• It will install to C:\Program Files\Trend Micro\HijackThis\hijackthis.exe
  
• After installing, you should get the user agreement, press accept and Hijack This will run.
  
• Select Do a system scan and save a log file. This will open a notepad file of everything Hijack This found, copy and paste it back here.
  

Thank you, I can open the internet and files now but the annoying pop up is still there. Can you help?

Can you run Hijack This and do a scan?