W32.Virut.CF (also referred to as W32/Virut.n) is a virus that will attempt to infect executable files such as .exe, .scr and other Portable Executable (PE) file formats. W32.Virut.CF will inject an iframe into the body of the web-related files such as .html, .php and .asp, in order to further harm your computer. The most challenging thing about W32.Virut.CF is the fact that it can bypass antivirus program detection and evade the scanning process by using Entry Point Obfuscation (EPO).

W32.Virut.CF Manual Removal Instructions
Backup Reminder: Always be sure to back up your PC before making any changes.

Step 1 : Use Registry Editor to Remove W32.Virut.CF Registry Values
Locate and delete "W32.Virut.CF" registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List

Read more on How to Remove W32.Virut.CF Registry Entries