You need to download it from our website and install it.
To activate VIRUSfighter, please do this:
Go to Start -> All Programs -> Fighters -> VIRUSfighter -> VIRUSfighter
Click Account -> Renew VIRUSfighter.
Enter the product key shown on your invoice and click the Add Product Key button.
After this please try to update your VIRUSfighter to be sure you have the latest updates.